Question

The cost price of 10 pencils is the selling price of 8 pencils what is the profit percentage?

Answer 1

CP OF 10 PENCILS=SP OF 8 PENCILS
LET THE CP OF 1 PENCIL BE ₹1
CP OF 10 PENCILS = ₹10
SP OF 8 PENCILS = ₹10
SP OF 1 PENCIL = ₹ 10/8 = ₹ 5/4
SP>CP
PROFIT = SP-CP
= 5/4 -1
= ₹1/4
PROFIT % =PROFIT/CP×100
= 1/4/1×100
= 25%

HOPE IT HELPS...!!
@Mansi

Answer 2

10cp=8sp

Sp:cp=10:8

P=((sp-cp)/cp)*100

P=((10-8/8))*100

P=(2/8)*100

P=25%