Question

the selling price of 10 balls is equal to the cost price of 15 balls find the gain or loss percent​

Answer 1

Answer:

Step-by-step explanation:

Formula to calculate cost price if selling price and profit percentage are given: CP = ( SP * 100 ) / ( 100 + percentage profit). Formula to calculate cost price if selling price and loss percentage are given: CP = ( SP * 100 ) / ( 100 – percentage loss ).

Answer 2

Step-by-step explanation:

10 SP = 15 CP

SP/CP = 15/10 = 3/2

LET SP = 3X

AND CP = 2X

GAIN % =

$(3x - 2x) \div 3x \times 100 \\ = x \div 3x \times 100 \\= 1 \div 3 \times 100 \\ = 100 \div 3 \\ = 33 + 1 \div 3\%$