2. If the SP of 25 CDs is equal to the CP of 30 CDs, find the gain percentage
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Answer:
Step-by-step explanation:
LET CP OF 30 CDs = X
CP OF 1 CD = X/30
SP OF 25 CD = X
SP OF 1 CD = X/25
P = SP - CP = X/25 - X/30 = ( 6X -5X) / 150 = X/150
P% = P/CP × 100
= X/150/X × 100
= 1/150 × 100
= 2/3% = 6.67%
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