Copier Y prints at a rate of 92 brochures in every 4 minutes and Copier Z prints at a rate of 150 brochures in every 6 minutes. At 8 p.m., both copiers started printing. After a while, Copier Y stopped printing for some time as the ink cartridges were being changed before it continued to print again. Copier Z continued printing during this time. At 10 p.m., the total number of brochures printed during the past two hours was 5932. Express the number of brochures printed by Copier Y 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 Y prints per min = 92 ÷ 4 = 23
Number of brochures Copier Z prints per min = 150 ÷ 6 = 25

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

Number of brochures printed by Copier Z in 8 h
= 120 x 25
= 3000

Number of brochures printed by Copier Y in 8 h
= 5932 - 3000
= 2932

Percentage of the number of brochures that Copier Y printed over the total number of brochures printed
= ²⁹³²₅₉₃₂ x 100%
≈ 49.43%

Answer(s): 49.43%