What Have We Discussed?
1. A way of comparing quantities is percentage. Percentages are numerators of fractions with denominator
For example 82% marks means 82 marks out of
2. Fractions can be converted to percentages and vice-versa. For example,
3. Decimals too can be converted to percentages and vice-versa. For example, 0.25 = 0.25 × 100% =
4. Percentages are widely used in our daily life,
(a) We have learnt to find exact number when a certain per cent of the total quantity is given.
(b) When parts of a quantity are given to us as ratios, we have seen how to convert them to percentages.
(c) The increase or decrease in a certain quantity can also be expressed as percentage.
(d) The profit or loss incurred in a certain transaction can be expressed in terms of percentages.
(e) While computing interest on an amount borrowed, the rate of interest is given in terms of per cents. For example, ₹ 800 borrowed for 3 years at 12% per annum.