Copier J prints at a rate of 102 flyers in every 2 minutes and Copier K prints at a rate of 138 flyers in every 6 minutes. At 1 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 4 p.m., the total number of flyers printed during the past three hours was 7144. Express the number of flyers printed by Copier J as a percentage of the total number of flyers printed by both copiers. Round off your answer to 2 decimal places.
Number of flyers Copier J prints per min = 102 ÷ 2 = 51
Number of flyers Copier K prints per min = 138 ÷ 6 = 23

From 1 p.m. to 4 p.m. = 3 h
1 h = 60 min
3 h = 180 min

Number of flyers printed by Copier K in 1 h
= 180 x 23
= 4140

Number of flyers printed by Copier J in 1 h
= 7144 - 4140
= 3004

Percentage of the number of flyers that Copier J printed over the total number of flyers printed
= ³⁰⁰⁴₇₁₄₄ x 100%
≈ 42.05%

Answer(s): 42.05%