Fill the gaps. Write the correct number in these equivalent fractions

Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
a) 12/ = 4/5

b) /2 = 6/12

c) 8/12 = /6

d) 2/ = 10/25

e) /8 = 1/2

f) 8/10 = 4/

10/ = 2/4

5/25 = 1/

2/4 = 12/

/2 = 4/8