Multiple choice

Two numbers X and Y are 20% and 28% less than a third number Z. Find by what percentage is the number Y less the number X?

  1. 15

  2. 25

  3. 20

  4. 28

  5. 10
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

As per the given data: X = Z * (80/100) => X is 20% less than Z. Y = Z * (72/100) => Y is 28% less than Z. Lets assume Y is m% less than X. So, Y = X(100 - m)/100 => z * (72/100) = Z * (80/100) (100 -m)/100 => m = 90 =>100 - m = 10 So, Y is 10 % less the number X. Option 5 is correct.

Keep practicing — related questions