Copier N prints at a rate of 90 brochures in every 3 minutes and Copier P prints at a rate of 160 brochures in every 5 minutes. At 6 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 8 p.m., the total number of brochures printed during the past two hours was 8129. 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 = 90 ÷ 3 = 30
Number of brochures Copier P prints per min = 160 ÷ 5 = 32

From 6 p.m. to 8 p.m. = 2 h
1 h = 60 min
2 h = 120 min

Number of brochures printed by Copier P in 6 h
= 120 x 32
= 3840

Number of brochures printed by Copier N in 6 h
= 8129 - 3840
= 4289

Percentage of the number of brochures that Copier N printed over the total number of brochures printed
= ⁴²⁸⁹₈₁₂₉ x 100%
≈ 52.76%

Answer(s): 52.76%