If one pulley has a diameter of 45cm and another has a diameter of 20cm, what is the ratio of the smaller diameter of the larger diameter? Reduce your answer

Question

Explain properly please

Answer 1

smaller to larger is 20:45

 

Set it up as a fraction and reduce it:  20/45 = 4/9

 

The reduced ratio is 4 to 9 or 4:9