Copier L prints at a rate of 100 brochures in every 5 minutes and Copier M prints at a rate of 120 brochures in every 5 minutes. At 2 p.m., both copiers started printing. After a while, Copier L stopped printing for some time as the ink cartridges were being changed before it continued to print again. Copier M continued printing during this time. At 4 p.m., the total number of brochures printed during the past two hours was 8045. Express the number of brochures printed by Copier L 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 L prints per min = 100 ÷ 5 = 20
Number of brochures Copier M prints per min = 120 ÷ 5 = 24

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

Number of brochures printed by Copier M in 2 h
= 120 x 24
= 2880

Number of brochures printed by Copier L in 2 h
= 8045 - 2880
= 5165

Percentage of the number of brochures that Copier L printed over the total number of brochures printed
= ⁵¹⁶⁵₈₀₄₅ x 100%
≈ 64.20%

Answer(s): 64.20%