Since 1:2 and 10:20 are equivalent ratios, it can be written as 1:2==10:20
The length and breadth of a rectangle are 20 cm and 10 cm respectively. What is the ratio of length of the rectangle to its area?
Find a single discount (as percent) equivalent to following successive discounts : (i) 20% and 12% (ii) 10%, 20% and 20% (iii) 20%, 10% and 5%