Copier N prints at a rate of 90 leaflets in every 3 minutes and Copier P prints at a rate of 144 leaflets 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 7 p.m., the total number of leaflets printed during the past four hours was 8314. Express the number of leaflets printed by Copier N as a percentage of the total number of leaflets printed by both copiers. Round off your answer to 2 decimal places.
Number of leaflets Copier N prints per min = 90 ÷ 3 = 30
Number of leaflets Copier P prints per min = 144 ÷ 6 = 24

From 3 p.m. to 7 p.m. = 4 h
1 h = 60 min
4 h = 240 min

Number of leaflets printed by Copier P in 3 h
= 240 x 24
= 5760

Number of leaflets printed by Copier N in 3 h
= 8314 - 5760
= 2554

Percentage of the number of leaflets that Copier N printed over the total number of leaflets printed
= ²⁵⁵⁴₈₃₁₄ x 100%
≈ 30.72%

Answer(s): 30.72%