whitch is bigger 3/9 or 4/10 ?
Make both fractions the saame type of fraction.
I.e. 3/9 is a 1/9 type of fraction and 4/10 is a 1/10 type of fraction
If we give them both a common denominator, then they will both be of the same type and hence easier to compare.
There are no commmon factors between 9 and 10, so their common denominator is the product of them both, i.e 90. Make then both into 1/90 type of fraction.
This makes 3/9 = 30/90
and makes 4/10 = 36/90
When we now compare 36/90 with 30/90, we see that the first fraction is the greater.
Answer: 4/10 is greater than 3/9