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Anonymous
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You would change it by putting a 9 over a 10
0.5 is five-tenths ie 5/10 = 1/2
9 9/10
Think of it like money-that's 20 cents or 20 percent of a dollar ie 1/5
40/9 = (36+4)/9 = 36/9 + 4/9 = 4 + 4/9 or 44/9