https://www.google.com/search?q=fractions&biw=1280&bih=929&source=lnms&tbm=isch&sa=X&ved=0ahUKEwiFs7vzx9DLAhWF7CYKHaMIBQQQ_AUIBigB&dpr=1#imgrc=_

The denominator is the divisor of the fraction. The bottom number in a fraction that shows how many equal parts the whole is divided into.