Question:
Mrs Wang went shopping with some money. She spent 2/3 of her money on a refrigerator. She also spent $300 on an oven and 3/5 of the remaining money on an electric kettle. In the end, she had 1/15 of her money left.
(a) What fraction of her money was spent on the electric kettle?
(b) How much did she spend on the refrigerator?