Question

A machine takes 5.4 hours to make 9 parts. At that rate how many parts can the machine make in 25.8 hours

Answer 1

$\frac{5.4}{9} = \frac{25.8}{x}$    Cross multiply.

5.4x=9*25.8

5.4x=232.2    Divide both sides by 5.4

x=43

Answer 2

9 divided by 5.4 = approx. 1.6
1.6 times 25.8 = 41.28
The machine can make approx. 41.28 parts in 25.8 hours