Ratio= 60:200
Both are a multiple of 5
Divide both numbers by 5= 12:40
They then both are a multiple of 2
Divide both numbers by 2= 6:20
Again they are a multiple of 2
Divide both by 2= 3:10
You can no longer simplify this number because neither of those 2 numbers go into the same multiple so 3:10 is the simplest form