Answer: 74%
Step-by-step explanation: Trudy has 74 green and 26 brown marbles, right? When you add 74 and 26, you get exactly 100. This means it will be easier when looking for the percentage of something because the total number of marbles is 100. 74 of the total marbles are green, which means that 74% of the marbles are green and the remaining 26% are brown.
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