Copier T prints at a rate of 108 brochures in every 2 minutes and Copier U prints at a rate of 120 brochures in every 5 minutes. At 6 p.m., both copiers started printing. After a while, Copier T stopped printing for some time as the ink cartridges were being changed before it continued to print again. Copier U continued printing during this time. At 8 p.m., the total number of brochures printed during the past two hours was 8247. Express the number of brochures printed by Copier T 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 T prints per min = 108 ÷ 2 = 54
Number of brochures Copier U prints per min = 120 ÷ 5 = 24

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

Number of brochures printed by Copier U in 6 h
= 120 x 24
= 2880

Number of brochures printed by Copier T in 6 h
= 8247 - 2880
= 5367

Percentage of the number of brochures that Copier T printed over the total number of brochures printed
= ⁵³⁶⁷₈₂₄₇ x 100%
≈ 65.08%

Answer(s): 65.08%