Copier C prints at a rate of 90 flyers in every 5 minutes and Copier D prints at a rate of 132 flyers in every 6 minutes. At 2 p.m., both copiers started printing. After a while, Copier C stopped printing for some time as the ink cartridges were being changed before it continued to print again. Copier D continued printing during this time. At 4 p.m., the total number of flyers printed during the past two hours was 7597. Express the number of flyers printed by Copier C 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 C prints per min = 90 ÷ 5 = 18
Number of flyers Copier D prints per min = 132 ÷ 6 = 22

From 2 p.m. to 4 p.m. = 2 h
1 h = 60 min
2 h = 120 min

Number of flyers printed by Copier D in 2 h
= 120 x 22
= 2640

Number of flyers printed by Copier C in 2 h
= 7597 - 2640
= 4957

Percentage of the number of flyers that Copier C printed over the total number of flyers printed
= ⁴⁹⁵⁷₇₅₉₇ x 100%
≈ 65.25%

Answer(s): 65.25%