The original sales price of a jacket to the original price is 3: 4. the original price is $64 what is the sales price

So we need to find a number that has the same ratio to 64 as 3 has to four. We do this by diving 64 into 4:(this is 16): so the two ratios are different by 16. To find the remaining number we multiply  3 by 16: this is 48. So 48 has the same ratio to 64 as 3 has to 4.

And 48 is the answer!