Copier P prints at a rate of 100 leaflets in every 4 minutes and Copier Q prints at a rate of 126 leaflets in every 6 minutes. At 3 p.m., both copiers started printing. After a while, Copier P stopped printing for some time as the ink cartridges were being changed before it continued to print again. Copier Q continued printing during this time. At 5 p.m., the total number of leaflets printed during the past two hours was 6638. Express the number of leaflets printed by Copier P 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 P prints per min = 100 ÷ 4 = 25
Number of leaflets Copier Q prints per min = 126 ÷ 6 = 21

From 3 p.m. to 5 p.m. = 2 h
1 h = 60 min
2 h = 120 min

Number of leaflets printed by Copier Q in 3 h
= 120 x 21
= 2520

Number of leaflets printed by Copier P in 3 h
= 6638 - 2520
= 4118

Percentage of the number of leaflets that Copier P printed over the total number of leaflets printed
= ⁴¹¹⁸₆₆₃₈ x 100%
≈ 62.04%

Answer(s): 62.04%