John earned 40% more per month than Oscar. If john salary is decreased 10% and Oscar’s salary is increased by 10%, then john would be earning what percent more than Oscar? Choose the correct option.
A) 10%
B) 9.09%
C) 15.54%
D) 14.54%
E) It cannot be determined from the information given.
This Q is all about taking the correct BASE for taking %s..   the very first step requires taking some numbers for each..   ONE should be 100...   it is easy to take 60 and 100 here..   but the BASE is 100 here, so the salary can be 100 and 140..   100 increases 10% =110..   140 decreases 10%=126..   so the increase is 16..   again the BASE is 110, so answer 16/110 * 100= 14.54% C   without calculations,   answer cannot be equal to or greater than 16, as 16 is on 110..   so 14.54% is the only one left
<result>D</result>
John earned 40% more per month than Oscar. If john salary is decreased 10% and Oscar’s salary is increased by 10%, then john would be earning what percent more than Oscar?