Question

Four fifths of a number exeeds two fifths of the number by 10. Find the number.​

Answer 1

Answer:

Required number is 25.

Step-by-step explanation:

Let the required number be a.

According to the question : 4 / 5 th of a exceeds 2 / 5 of a by 10. { a / b of a number = a / b x that number }

= > 4 / 5 x a = ( 2 / 5 x a ) + 10

= > 4a / 5 = 2a / 5 + 10

= > 4a / 5 - 2a / 5 = 10

= > ( 4a - 2a ) / 5 = 10

= > 2a / 5 = 10

= > a = 5 x 10 / 2 = 25

Hence the required number is 25.