Problem Solving

HOw can u solve this using smart value?

Certain stocks in January were 10% less then they were in Febuary and 20% greater then they were in March. What is the percent decrease in stocks from Febuary to March?

A.)5%
B.)20%
C.)25%
D.)40%
E.)50%

HPengineer wrote:HOw can u solve this using smart value?

Certain stocks in January were 10% less then they were in Febuary and 20% greater then they were in March. What is the percent decrease in stocks from Febuary to March?

A.)5%
B.)20%
C.)25%
D.)40%
E.)50%

Jan - 10% less than Feb = 90
Feb - 100 (Assume)
Mar - x

90 = 20% greater than march = 1.2x. Solve for x, x = 75.
(F-M/F)*100 = ((100-75)/100)*100 = 25% decrease.
Hence C.

thanks i clearly see my flaw now...

im about to post another percent problem... tell me your thoughts..

HPengineer wrote:HOw can u solve this using smart value?

Certain stocks in January were 10% less then they were in Febuary and 20% greater then they were in March. What is the percent decrease in stocks from Febuary to March?

A.)5%
B.)20%
C.)25%
D.)40%
E.)50%

first of all i was stuck on this problem because it says " greater than they were in march" i thought that greater number of stock in march compare to the number of stock in january thus i got stuck... now
ok...
suppose the february is 100
january=90% february so january is 90
the stock in feb compared to march=1,2 march or 90=1,2 march
so march = 75
thus (100-75)/75 =0,25%