Which is greater 7/8 or 2/3
2 answers:
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Jenny is incorrect in her calculation.
For every time that Jenny's brother washed dishes, Jenny washed dishes 4 times. This tells that the the times they washed dishes occur in the ratio 4 :1. If Jenny's brother washed dishes 8 times, Jenny has to have washed dishes times. The way Jenny's is doing the calculation implies that his brother washed dishes
times. He calculation yields a wrong result.