What is 0.01 percent of 12,356?

Expert replies

Max@Math Revolution: Elite Legendary Member; Posts: 3991; Joined: Fri Jul 24, 2015 2:28 amFollowed by: 37 members; Location: Las Vegas, USA; Thanked: 19 times

by Max@Math Revolution » Mon May 02, 2016 4:15 am

What is 0.01 percent of 12,356?

A. 0.12356
B. 1.2356
C. 12.356
D. 0.012356
E. 0.0012356

* A solution will be posted in two days.

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Brent@GMATPrepNow: GMAT Instructor; Posts: 16206; Joined: Mon Dec 08, 2008 6:26 pmFollowed by: 1268 members; Location: Vancouver, BC; Thanked: 5254 times; GMAT Score:770

by Brent@GMATPrepNow » Mon May 02, 2016 6:33 am

Max@Math Revolution wrote:What is 0.01 percent of 12,356?

A. 0.12356
B. 1.2356
C. 12.356
D. 0.012356
E. 0.0012356

Let's work our way down to 0.01%

10% of 12356 = 1235.6
1% of 12356 = 123.56
0.1% of 12356 = 12.356
0.01% of 12356 = 1.2356

Answer: B

Cheers,
Brent

Brent Hanneson - Creator of GMATPrepNow.com

OptimusPrep: Master | Next Rank: 500 Posts; Posts: 410; Joined: Fri Mar 13, 2015 3:36 amFollowed by: 8 members; Location: Worldwide; Thanked: 120 times; GMAT Score:770

by OptimusPrep » Mon May 02, 2016 7:14 pm

Max@Math Revolution wrote:What is 0.01 percent of 12,356?

A. 0.12356
B. 1.2356
C. 12.356
D. 0.012356
E. 0.0012356

* A solution will be posted in two days.

0.01% = 0.01/100 = 1/(100*100)

0.01% of 12,356 = 1.2536

Correct Option: B

diegocml: Senior | Next Rank: 100 Posts; Posts: 67; Joined: Tue Mar 15, 2016 10:35 am; Thanked: 7 times; GMAT Score:410

by diegocml » Wed May 04, 2016 3:44 am

Brent@GMATPrepNow wrote:
Max@Math Revolution wrote:What is 0.01 percent of 12,356?

A. 0.12356
B. 1.2356
C. 12.356
D. 0.012356
E. 0.0012356
Let's work our way down to 0.01%

10% of 12356 = 1235.6
1% of 12356 = 123.56
0.1% of 12356 = 12.356
0.01% of 12356 = 1.2356

Answer: B

Cheers,
Brent

Hey Brent, so

10% of a number: Move the decimal point one place to the left
1% of a number: Move the decimal point two places to the left
0.1% of a number: Move the decimal point three places to the left
0.01% of a number: Move the decimal point four places to the left

Diego

1st GMAT attemp: 410 (Q18 V27)
2nd GMAT attemp: 490 (Q35 V23)

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Brent@GMATPrepNow: GMAT Instructor; Posts: 16206; Joined: Mon Dec 08, 2008 6:26 pmFollowed by: 1268 members; Location: Vancouver, BC; Thanked: 5254 times; GMAT Score:770

by Brent@GMATPrepNow » Wed May 04, 2016 4:20 am

diegocml wrote:
Brent@GMATPrepNow wrote:
Max@Math Revolution wrote:What is 0.01 percent of 12,356?

A. 0.12356
B. 1.2356
C. 12.356
D. 0.012356
E. 0.0012356
Let's work our way down to 0.01%

10% of 12356 = 1235.6
1% of 12356 = 123.56
0.1% of 12356 = 12.356
0.01% of 12356 = 1.2356

Answer: B

Cheers,
Brent
Hey Brent, so

10% of a number: Move the decimal point one place to the left
1% of a number: Move the decimal point two places to the left
0.1% of a number: Move the decimal point three places to the left
0.01% of a number: Move the decimal point four places to the left

Exactly.
Once you know that, you can calculate most percentages in your head. Here's a video on how to do that:
- Finding x Percent of y: https://www.gmatprepnow.com/module/gmat ... video/1076

Cheers,
Brent

Brent Hanneson - Creator of GMATPrepNow.com

Max@Math Revolution: Elite Legendary Member; Posts: 3991; Joined: Fri Jul 24, 2015 2:28 amFollowed by: 37 members; Location: Las Vegas, USA; Thanked: 19 times

by Max@Math Revolution » Wed May 04, 2016 6:48 am

Since, Percent=1/100, what=something(s), and is:=. We can write the question as s=0.01(1/100)12,356. The answer is 1.2356. Hence, the correct answer is B.

- Forget conventional ways of solving math questions. In DS, Variable approach is the easiest and quickest way to find the answer without actually solving the problem. Remember equal number of variables and independent equations ensures a solution.

GMAT/MBA Expert

Brent@GMATPrepNow: GMAT Instructor; Posts: 16206; Joined: Mon Dec 08, 2008 6:26 pmFollowed by: 1268 members; Location: Vancouver, BC; Thanked: 5254 times; GMAT Score:770

by Brent@GMATPrepNow » Fri Jan 12, 2018 7:18 am

Max@Math Revolution wrote:What is 0.01 percent of 12,356?

A. 0.12356
B. 1.2356
C. 12.356
D. 0.012356
E. 0.0012356

Let's work our way down to 0.01%

10% of 12356 = 1235.6
1% of 12356 = 123.56
0.1% of 12356 = 12.356
0.01% of 12356 = 1.2356

Answer: B

Cheers,
Brent

Brent Hanneson - Creator of GMATPrepNow.com

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