Copier B prints at a rate of 100 leaflets in every 4 minutes and Copier C prints at a rate of 156 leaflets in every 6 minutes. At 3 p.m., both copiers started printing. After a while, Copier B stopped printing for some time as the ink cartridges were being changed before it continued to print again. Copier C continued printing during this time. At 7 p.m., the total number of leaflets printed during the past four hours was 8802. Express the number of leaflets printed by Copier B as a percentage of the total number of leaflets printed by both copiers. Round off your answer to 2 decimal places.
Number of leaflets Copier B prints per min = 100 ÷ 4 = 25
Number of leaflets Copier C prints per min = 156 ÷ 6 = 26

From 3 p.m. to 7 p.m. = 4 h
1 h = 60 min
4 h = 240 min

Number of leaflets printed by Copier C in 3 h
= 240 x 26
= 6240

Number of leaflets printed by Copier B in 3 h
= 8802 - 6240
= 2562

Percentage of the number of leaflets that Copier B printed over the total number of leaflets printed
= ²⁵⁶²₈₈₀₂ x 100%
≈ 29.11%

Answer(s): 29.11%