Question

sp=rs 1000 profit=20% cp=?

Answer 1

Hey mate!
CP = SP × 100 / 100 × Profit %
CP = 1000 × 100 / 100 + 20
1000 × 100 / 120
8.33 × 100
₹ 833

Answer 2

Intrest for the first year=(1000×20×1)÷(100)=400rs

Amount at the end of the first year=rs(1000+200)=rs1200

Principal for the second year=(1200×20×1)÷(100)=240rs

Amount at the end of the second year=rs(1200+240)=rs1440

Amount=rs1440

C.I=(Amount)-(original principal)=rs(1440-1000)=440rs

C.P=440rs