Copier K prints at a rate of 98 brochures in every 2 minutes and Copier L prints at a rate of 140 brochures in every 5 minutes. At 3 p.m., both copiers started printing. After a while, Copier K stopped printing for some time as the ink cartridges were being changed before it continued to print again. Copier L continued printing during this time. At 5 p.m., the total number of brochures printed during the past two hours was 8179. Express the number of brochures printed by Copier K 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 K prints per min = 98 ÷ 2 = 49
Number of brochures Copier L prints per min = 140 ÷ 5 = 28

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

Number of brochures printed by Copier L in 3 h
= 120 x 28
= 3360

Number of brochures printed by Copier K in 3 h
= 8179 - 3360
= 4819

Percentage of the number of brochures that Copier K printed over the total number of brochures printed
= ⁴⁸¹⁹₈₁₇₉ x 100%
≈ 58.92%

Answer(s): 58.92%