Price of petrol was Rs p per litre last month. Price of petrol now is Rs (p – 5) per litre.

Sharad used to take p cups tea a day. After having some health problem, he takes p – 5 cups of tea a day.

The number of students dropping out of school last year was m. Number of students dropping out of school this year is m – 30.

Khader’s monthly salary was Rs P in the year 2005. His salary in

2006 was Rs (P + 1000).

The number of girls enrolled in a school last year was g. The number of girls enrolled this year in the school is 3g – 10.