Identify common denominator: Identify the common denominator.Both fractions have the same denominator, which is 15.
Subtract numerators: Subtract the numerators.Since the denominators are the same, we can subtract the numerators directly.(157)−(152)=(157−2)
Perform subtraction: Perform the subtraction.Subtract 2 from 7 to get 5.(7−2)/(15)=5/15
Simplify fraction: Simplify the fraction, if possible.The fraction 155 can be simplified by dividing both the numerator and the denominator by their greatest common divisor, which is 5.155=(15÷5)(5÷5)=31
More problems from Multiplication with rational exponents