JAMB - Mathematics (1982 - No. 12)
A man bought wrist watch for N150 but was only able to sell it for N120. Find the loss per cent on the transaction
25%
11%
20%
80%
30%
Explication
Loss% = \(\frac{\text{actual loss}}{\text{cost price}}\) x 100%
\(\frac{N150 - N120}{N150} \times 100%\)
\(\frac{N30}{N150} \times 100%\)
= 20%