Question

a man sells his Scooter for rupees 3,000 making a profit of 20% How much did the scooter cost him

Answer 1

Use the formula
C.P=[100/ (100+gain%)] × S.P
= 100/ (100+20%)] ×3000
= 100/ (120) ×3000
= ₹2500

Answer 2

sp=3000 at gain% 20.
cp=100+gain%/100×sp
120/100×3000= 3600
so, cp=3600