Respuesta :
72 rode their bikes.
Explanation:
18 did not ride their bike, which makes 1/5. Multiply 18 by 5, which will give you the other 4/5. Subtract 18 from 90, and you will get 72.
Explanation:
18 did not ride their bike, which makes 1/5. Multiply 18 by 5, which will give you the other 4/5. Subtract 18 from 90, and you will get 72.