Question

For each fraction if you multiply both the numerator and the denominator by the same number is the resulting fraction equivalent to the original fraction ?

Answer 1

Yes, it is. 

example : 
1/2 * 2/2 = 2/4...so 1/2 and 2/4 are equivalent because 2/4 reduces to 1/2

1/3 * 3/3 = 3/9...so 3/9 is equivalent to 1/3 because 3/9 can reduce to 1/3