Copier R prints at a rate of 115 brochures in every 5 minutes and Copier S prints at a rate of 135 brochures in every 5 minutes. At 8 p.m., both copiers started printing. After a while, Copier R stopped printing for some time as the ink cartridges were being changed before it continued to print again. Copier S continued printing during this time. At 10 p.m., the total number of brochures printed during the past two hours was 5953. Express the number of brochures printed by Copier R 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 R prints per min = 115 ÷ 5 = 23
Number of brochures Copier S prints per min = 135 ÷ 5 = 27

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

Number of brochures printed by Copier S in 8 h
= 120 x 27
= 3240

Number of brochures printed by Copier R in 8 h
= 5953 - 3240
= 2713

Percentage of the number of brochures that Copier R printed over the total number of brochures printed
= ²⁷¹³₅₉₅₃ x 100%
≈ 45.57%

Answer(s): 45.57%