Are these fractions equivalent or nonequivalent? 4m/5n 8m/10n i'm thinking no since you can't divide them all by one number? ? i'm just trying to make sure i'm right

To compare whether or not two fractions are equivalent, they must have the same denominator. 

What is a common denominator you can make between and ? Some possible options are 5n or 10n.

I'll make both denominators 5n:
1) already has 5n in the denominator.
2) To get 5n in the denominator for , you want to divide both the numerator and denominator by 2 (same as multiplying top and bottom by ). Since you're doing the same thing to the numerator and denominator, you are not changing the value of the fraction:


Now compare the two fractions. Since , your fractions are equivalent!

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They are equivalent