Copier N prints at a rate of 93 brochures in every 3 minutes and Copier P prints at a rate of 132 brochures in every 6 minutes. At 3 p.m., both copiers started printing. After a while, Copier N stopped printing for some time as the ink cartridges were being changed before it continued to print again. Copier P continued printing during this time. At 5 p.m., the total number of brochures printed during the past two hours was 6918. Express the number of brochures printed by Copier N 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 N prints per min = 93 ÷ 3 = 31
Number of brochures Copier P prints per min = 132 ÷ 6 = 22

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

Number of brochures printed by Copier P in 3 h
= 120 x 22
= 2640

Number of brochures printed by Copier N in 3 h
= 6918 - 2640
= 4278

Percentage of the number of brochures that Copier N printed over the total number of brochures printed
= ⁴²⁷⁸₆₉₁₈ x 100%
≈ 61.84%

Answer(s): 61.84%