Copier P prints at a rate of 117 brochures in every 3 minutes and Copier Q prints at a rate of 156 brochures in every 6 minutes. At 8 p.m., both copiers started printing. After a while, Copier P stopped printing for some time as the ink cartridges were being changed before it continued to print again. Copier Q continued printing during this time. At 10 p.m., the total number of brochures printed during the past two hours was 7585. Express the number of brochures printed by Copier P 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 P prints per min = 117 ÷ 3 = 39
Number of brochures Copier Q prints per min = 156 ÷ 6 = 26

From 8 p.m. to 10 p.m. = 2 h
1 h = 60 min
2 h = 120 min

Number of brochures printed by Copier Q in 8 h
= 120 x 26
= 3120

Number of brochures printed by Copier P in 8 h
= 7585 - 3120
= 4465

Percentage of the number of brochures that Copier P printed over the total number of brochures printed
= ⁴⁴⁶⁵₇₅₈₅ x 100%
≈ 58.87%

Answer(s): 58.87%