Last year, oranges were available at ₹ 24 per dozen; but this year, they are available at ₹ 50 per score. Find the percentage change in the price of oranges. [1 score = 20]

Increase 180 by 25%.

A number when increased by 23% becomes 861; find the number.

A number when decreased by 16% becomes 798; find the number.