To add or subtract fractions with different denominators first find the equivalent fractions with a _ denominator

Answer: Common

Step-by-step explanation:

The answer is with a multiplication of denominators, because when you multiply the denominator of one fraction with the denominator of the other fraction, we will get product which could divide between both denominator

for example if you have the following equation:

2/3+2/4

and you multiply 3*4 = 12

and you can use it to complete the equation as a common denominator