By what fraction selling price $(S.P.)$ must be multiplied to get the cost price $(C.P.)$ if the loss is $20 \%$?

$A$ tradesman gives $4 \%$ discount on the marked price and gives $1$ book free for buying every $15$ books and thus gains $35 \%$. The marked price is increased above the cost price by (approx.) (in $\%$).

$A$ man gains $15 \%$ by selling a calculator for a certain price. If he sells it at triple the price,then what will be the profit percentage (in $\%$)?

If on selling $12$ notebooks,a seller makes a profit equal to the selling price of $4$ notebooks,what is his percent profit?

$20 \%$ loss on selling price is what per cent loss on the cost price? (in $\%$)

$A$ person sold a horse at a gain of $15 \%$. Had he bought it for $25 \%$ less and sold it for $₹ 60$ less,he would have made a profit of $32 \%$. The cost price of the horse was (in $₹$):