No, they aren't equal
three fifths = 3/5 = 0.600
seven ninths = 7/9 = 0.778
Not only don't they LOOK the same, but 3/5 is 60% while 7/9 equals 77.78%
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Five ninths.
3/5 + 7/9 = 27/45 + 35/45 = 62/45
-7/9 x 3/5 = - (7x3)/(9x5) = -7/15
1/3
One-third plus three-ninths is 2/3.7/9