Question

Find the ratio of the following:

(a) Speed of a cycle 15 km per hour to the speed of scooter 30 km per hour.

(b) 5 m to 10 km

(c) 50 paise to Rs 5

Solution

In a ratio, the quantities are in the same unit. If they are not in the same units, then first we convert them in the same unit.

Question

Convert the following ratios to percentages.

(a) 3 : 4 (b) 2 : 3

Solution

Question

Solution

72% of 25 are good in Mathematics.

∴ (100 - 72)% of 25 students are not good in Mathematics.

or 28% of 25 students are not good in Mathematics

Question

Solution