Math Olympiad for Elementary | 2021 | Division E | Contest 5 | MOEMS | 5C

Problem: 5C Amanda pours 3/4 of her water into Barbara's empty bottle. Barbara then pours 3/5 of her water into Charlie's empty bottle. Charlie then pours 1/2 of his water into David's empty bottle. If David now has 18 ounces of water, how many ounces does Amanda still have?

Key: Make a chart and solve the problem step by step, set unknown values as variables

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