We want to convert our fractions in a way the denominators are potencys of 10. Let's start with the first one.
If we multiply both the numerator and denominator by 25, we're going to have
Now, with the next fraction
Dividing both numerator and denominator by 12, we have
Again, If we multiply both the numerator and denominator by 25, we're going to have
For the next fraction, it is enough to multiply both numerator and denominator by 4
For the next one, we can again multiply both the numerator and denominator by 25