1/9 of total marbles = 1/9 × 36 = 4 so Alexis gave 4 marbles to Sara. And so Alexis is left behind with 32 (36-4) marbles and so Sara have 4 marbles now
Alexis has 36 marbles he gives 1/9 of marbles away to Sara. How many marbles did Sara have?
Answer: Just simply divide 36 by the denominator. 36/9 = 4. If the numerator was above one then you would have had to multiply by that. However, in this case it is not required to do so.
