Copier J prints at a rate of 106 leaflets in every 2 minutes and Copier K prints at a rate of 120 leaflets in every 6 minutes. At 5 p.m., both copiers started printing. After a while, Copier J stopped printing for some time as the ink cartridges were being changed before it continued to print again. Copier K continued printing during this time. At 9 p.m., the total number of leaflets printed during the past four hours was 7357. Express the number of leaflets printed by Copier J 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 J prints per min = 106 ÷ 2 = 53
Number of leaflets Copier K prints per min = 120 ÷ 6 = 20

From 5 p.m. to 9 p.m. = 4 h
1 h = 60 min
4 h = 240 min

Number of leaflets printed by Copier K in 5 h
= 240 x 20
= 4800

Number of leaflets printed by Copier J in 5 h
= 7357 - 4800
= 2557

Percentage of the number of leaflets that Copier J printed over the total number of leaflets printed
= ²⁵⁵⁷₇₃₅₇ x 100%
≈ 34.76%

Answer(s): 34.76%