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
