Question

Qid : 43 - a number is first decreased by 30% and then increased by 30%. If the number so obtained is 72 less than the original number, then what is the value of the original number?

Answer 1

Answer:

240

Step-by-step explanation:

let the number be x.

According to the question

=> x - (30/100 × x) = x - 72

=> x - 3x/10 -x = 72

=> 10x -3x -10x/100 = 72

=> 3x /10 =72

=> 3x = 72×10

=> x = 720/3

=> x = 240