A man bought a certain number of oranges; out of which 13 percent were found rotten. He gave 75% of the remaining in charity and still had 522 oranges left. Find how many oranges had he bought ?

5% pupil in a town died due to some disease and 3% of the remaining left the town. If 2,76,450 pupil are still in the town, find the original number of pupil in the town.

In a combined test in Maths and Chemistry, 84% candidates passed in Maths, 76% in Chemistry and 8% failed in both. Find :

(i) the percentage of failed candidates.

(ii) if 340 candidates passed in the test, then, how many candidates had appeared in the test ?

A's income is 25% more than B's. Find out by how much percent is B's income less than A's ?