The seats allocated for Biology and Computer Science in a school are in the ratio 5 to 8. If the number of seats for Biology is increased by 30% and for Computer Science by 25%, what will be the new ratio of seats?

Explanation

Assuming the original seats are 5x for Biology and 8x for Computer Science, after the increase, the seats become (5x × 1.3) and (8x × 1.25) respectively. This gives 6.5x and 10x, which simplifies to the ratio 13:20.