Question

If a number increased by 20% and decresed by 25% then thr difference between them is 36 find the number

Answer 1

Answer:80

Step-by-step explanation:

Let th enumber be x,

Given,

(x+20% of x) - (x-25% of x)=36

(x+20x/100)-(x-25x/100)=36

(x+x/5)-(x-x/4)=36       (20/100=1/5 & 25/100=1/4)

(5x+x)/5)-((4x-x)/4)=36

6x/5-3x/4=36

(24x-15x)/20=36  (LCM of 5 and 4 is 20)

9x=36*20

9x=720

x=720/9=80