Try making them both into a common denominator
eg. 5 8ths is also 75 120ths
7 15ths is also 56 120ths
So 5 8ths is bigger.
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5/8 is greater than 3/7.
No. 5/8 in decimal form = 0.625, which is less than 7/10.
Put the fractions into 40ths, so 5/8 is 25/40, and 7/10 is 28/40, which shows 7/10 is bigger.
5 8ths 7/8 x 5/7 = 35/56 = 5/8
42/8, or 5 and 1 fourth