Copier J prints at a rate of 96 flyers in every 2 minutes and Copier K prints at a rate of 150 flyers 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 7 p.m., the total number of flyers printed during the past two hours was 8750. 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 = 96 ÷ 2 = 48
Number of flyers Copier K prints per min = 150 ÷ 6 = 25

From 5 p.m. to 7 p.m. = 2 h
1 h = 60 min
2 h = 120 min

Number of flyers printed by Copier K in 5 h
= 120 x 25
= 3000

Number of flyers printed by Copier J in 5 h
= 8750 - 3000
= 5750

Percentage of the number of flyers that Copier J printed over the total number of flyers printed
= ⁵⁷⁵⁰₈₇₅₀ x 100%
≈ 65.71%

Answer(s): 65.71%