Copier Q prints at a rate of 96 brochures in every 3 minutes and Copier R prints at a rate of 120 brochures in every 6 minutes. At 6 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 10 p.m., the total number of brochures printed during the past four hours was 8821. 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 = 96 ÷ 3 = 32
Number of brochures Copier R prints per min = 120 ÷ 6 = 20

From 6 p.m. to 10 p.m. = 4 h
1 h = 60 min
4 h = 240 min

Number of brochures printed by Copier R in 6 h
= 240 x 20
= 4800

Number of brochures printed by Copier Q in 6 h
= 8821 - 4800
= 4021

Percentage of the number of brochures that Copier Q printed over the total number of brochures printed
= ⁴⁰²¹₈₈₂₁ x 100%
≈ 45.58%

Answer(s): 45.58%