STEP 1: multiply 16 oz. by 3/4 to find how many ounces are 3/4 of the bottle
=16 * 3/4 =(16*3)/4 =48/4 =12 ounces
STEP 2: subtract step 1 answer from the whole 16 oz. to find number of ounces left
=16 - 12 =4 ounces left
CHECK: multiply the whole 16 oz. by the fraction that would be left (4/4 - 3/4= 1/4). There are several ways to check this problem; this is just one way.