A manufacturer fixes his selling price at $33 \%$ over the cost of production. If cost of production goes up by $12 \%$ and manufacturer raises his selling price by $10 \%,$ his percentage profit is

$60 \%$ of the cost price of an article is equal to $50 \%$ of its selling price. Then the percentage of profit or loss on the cost price is

On selling $17$ balls at $Rs.\, 720$, there is a loss equal to the cost price of 5 balls. The cost price of a ball is (in $Rs.$)

A cab driver makes a profit of $20 \%$ on every trip when he carries $3$ passengers and the price of petrol is $Rs.\,30$ a litre. Find the percentage profit for the same journey if he goes with four passengers per trip and the price of petrol reduces to $Rs.\, 24$ a litre? (in $\%$)

(Assume that revenue per passenger is the same in both the cases.)

Sudeep buys two $CDs$ for $Rs.\,380$ and sells one at a loss of $22 \%$ and the other at a gain of $12 \%$. If both the $CDs$ are sold at the same price, then the cost price of two $CDs$ is (in $Rs.$)

A dishonest dealer use a scale of $90\, cm$ instead of a metre scale and claims to sell at cost price. His profit is in $\%$