[] The fractions are
[tex]\frac{12}{21}\\\\\frac{4}{7}[/tex]
[] I see that 21 is a multiple of 7, so this one will be simple to solve.
-> 21 / 7 = 3, so we can do the following:
[tex]\frac{4*3}{7*3}=\frac{12}{21}[/tex]
[] Now they have a common denominator of 21
Have a nice day!
I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)
- Heather
