Question

Three dimes are 3/10 of a dollar. What equivalent fraction is 30 pennies

Answer 1

3/10 = 30/x
Since 3 is multiplied by 10 to get 30, you would multiply 10 by 10 as well. This would make x = 100.
So an equivalent fraction of 30 pennies if 30/100.

Answer 2

3/10 here hopes it is right