If Albert's monthly earnings rise by 26%...

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BTGmoderatorLU: Moderator; Posts: 2505; Joined: Sun Oct 15, 2017 1:50 pm; Followed by:6 members

If Albert's monthly earnings rise by 26%...

by BTGmoderatorLU » Tue Dec 19, 2017 11:09 am

If Albert's monthly earnigs rise by 26%, he would earn $693. If, instead, his earnings rise by only 20%, how much (in $) would he earn this month?

(A) 643
(B) 652
(C) 660
(D) 690
(E) 693

The OA is C.

I'm really confused with this PS question. Please, can any expert assist me with it? Thanks in advanced.

Quote

Source: Beat The GMAT — Problem Solving | Tue Dec 19, 2017 11:09 am

GMATWisdom: Master | Next Rank: 500 Posts; Posts: 100; Joined: Wed Nov 29, 2017 4:38 pm; Thanked: 14 times

by GMATWisdom » Tue Dec 19, 2017 11:48 am

LUANDATO wrote:If Albert's monthly earnigs rise by 26%, he would earn $693. If, instead, his earnings rise by only 20%, how much (in $) would he earn this month?

(A) 643
(B) 652
(C) 660
(D) 690
(E) 693

The OA is C.

I'm really confused with this PS question. Please, can any expert assist me with it? Thanks in advanced.

AGAINST 126 HE GETS 693
THEREFORE AGAINST 120 HE WILL GET= 693X120/126= 660
HENCE OPTION C IS CORRECT

Quote

GMAT/MBA Expert

Scott@TargetTestPrep: GMAT Instructor; Posts: 8086; Joined: Sat Apr 25, 2015 10:56 am; Location: Los Angeles, CA; Thanked: 43 times; Followed by:29 members

by Scott@TargetTestPrep » Thu Sep 12, 2019 6:22 pm

BTGmoderatorLU wrote:If Albert's monthly earnigs rise by 26%, he would earn $693. If, instead, his earnings rise by only 20%, how much (in $) would he earn this month?

(A) 643
(B) 652
(C) 660
(D) 690
(E) 693

The OA is C.

I'm really confused with this PS question. Please, can any expert assist me with it? Thanks in advanced.

Let x = the pre-raise earnings. We can create the equation:

1.26x = 693

x = 693/1.26 = 550

So after a 20% raise, he earns 550 * 1.2 = 660 dollars.

Answer: C

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