You may have answered your own question. Equivalent fractions have common factors. If they don't have common factors, they aren't equivalent.
equivalent factors are fractions where the numerator and denominator are multiplied by the same number, so equivalent fractions of 7/8 by 2,3, and 4 are (14/16, 21/24, and 28/32)
It can help by when finding the LCD (Least Common Denominator) you find the least number they have in common then that number is your equivalent fraction.
multiply the numerator and the denominator by the same number, or divide each side by a common factor.
Number factors help find common denominators in fractions and reducing fractions. In algebra they are used to find the answers to higher level equations like quadratics.
This can be especially helpful if you are adding or subtracting fractions, so the bottom number on both fractions will be the same
equivalent fractions
to make your denominator common you have to times a number that equals the same
Equivalent Fractions
6/10 and 3/5 are two fractions equivalent to 0.6. There are an infinite number of fractions equivalent to 0.6.
They are equivalent fractions
There are an infinite number of equivalent fractions. However, the simplest, or reduced, equivalent fraction is 3/10.
-- Find a common denominator. (It will be a number of which all three denominators are factors. The best choice is their least common multiple.) -- Change the fractions to their equivalents with the common denominator. -- Then add their numerators to get the numerator of their sum.