which fractions are equivalent to 25/45 ?

Answer 1

I can imagine "lots" of them
first of all 25/45 = 5/9 is simplified form

now multiply top and bottom by the same integer you want,
e.g. (5/9)(17/17) = 85/153
etc

for your given fractions, divide top by bottom
if you get .5555... your fraction is equivalent to 25/45