simplify ratio 45:75?

both sides divide by 5
so
45/5: 75/5
= 9:15

further, both sides now divide by 3
so
9/3:15/3
= 3:5

there is no common factor betwen 3 and 5 so this is the simplest form you can express that ratio

3:5



[edit] its probably worth pointing out since the common factors were 3 x 5 and the answer was 3:5
this is a COINCIDENCE and the factors will not always be shown in the final ration

3:5

45:75 = (3*3*5);(3*5*5) = 3:5.

3 : 5

3:5

3:5

45 : 75 = 15 : 25 = 3 : 5

3:5.

3:5

3:5