Copier Q prints at a rate of 110 brochures in every 2 minutes and Copier R prints at a rate of 136 brochures in every 4 minutes. At 3 p.m., both copiers started printing. After a while, Copier Q stopped printing for some time as the ink cartridges were being changed before it continued to print again. Copier R continued printing during this time. At 5 p.m., the total number of brochures printed during the past two hours was 8665. Express the number of brochures printed by Copier Q as a percentage of the total number of brochures printed by both copiers. Round off your answer to 2 decimal places.
Number of brochures Copier Q prints per min = 110 ÷ 2 = 55
Number of brochures Copier R prints per min = 136 ÷ 4 = 34

From 3 p.m. to 5 p.m. = 2 h
1 h = 60 min
2 h = 120 min

Number of brochures printed by Copier R in 3 h
= 120 x 34
= 4080

Number of brochures printed by Copier Q in 3 h
= 8665 - 4080
= 4585

Percentage of the number of brochures that Copier Q printed over the total number of brochures printed
= ⁴⁵⁸⁵₈₆₆₅ x 100%
≈ 52.91%

Answer(s): 52.91%