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Question:

If 4 people can run 8 machines, how many machines can 2 people run?

A 4
Explaination

Two people is 1/2 as many as 4 people: 2 ÷ 4 = 1/2. Multiply the number of machines 4 people can run by 1/2 to determine how many machines 2 people can run: 8 × 1/2 = 4.