Question

What 21 over 4 equivalent to

Answer 1

 $\frac{21}{4}$ = ? 

To find an equivalent fraction you multiply. 

 $\frac{21}{4}$ x 2 = 

⇒ 21 x 2 = 42 
⇒ 4 x 2 = 8

42/8 is equivalent to 21/4 

Answer 2

21/4 is equivalent to...

4 x 5 = 20
so, 21/4 = 5 1/4

5 1/4 = 5.25

5 1/4 = 5 2/8 = 42/8

42/8 = 84/16