What number can 12 and 63 be divided by

The answer is totally 1 since all of the integers are divisible by one. In addition to one, 3 is also divisible since 12/3=4 and 63/3=21

When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates. if you have a multiple-unit rate such as 120 students for every 3 buses, and want to find the single-unit rate, write a ratio equal to the multiple-unit rate with 1 as the second term.