Copier K prints at a rate of 117 flyers in every 3 minutes and Copier L prints at a rate of 150 flyers in every 6 minutes. At 7 p.m., both copiers started printing. After a while, Copier K stopped printing for some time as the ink cartridges were being changed before it continued to print again. Copier L continued printing during this time. At 9 p.m., the total number of flyers printed during the past two hours was 8905. Express the number of flyers printed by Copier K 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 K prints per min = 117 ÷ 3 = 39
Number of flyers Copier L prints per min = 150 ÷ 6 = 25

From 7 p.m. to 9 p.m. = 2 h
1 h = 60 min
2 h = 120 min

Number of flyers printed by Copier L in 7 h
= 120 x 25
= 3000

Number of flyers printed by Copier K in 7 h
= 8905 - 3000
= 5905

Percentage of the number of flyers that Copier K printed over the total number of flyers printed
= ⁵⁹⁰⁵₈₉₀₅ x 100%
≈ 66.31%

Answer(s): 66.31%