Question

the price of a cycle is first increased by 20% and later the price was decreased by 25% due to reduction in sales find the cost of the cycle if it's percent selling price is rs 900

Answer 1

sp =900
let cp be x
(100%-25%) of x =900
x=900×100/75
x=1200
increased 20%
(100%+20%) of x = 1200
x=1200×100
/120
x= 1000
cp=1000