Subtract 60/63 from 80/30, Solve 2 20/30

Subtract 60/63 from 80/30

1^st number: 2 20/30, 2^nd number: 60/63

80/30 - 60/63 is 12/7.

Find the least common denominator or LCM of the two denominators:
LCM of 30 and 63 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 30 × 21 = 630,
80/30 = 80 × 21/30 × 21 = 1680/630
Likewise, for the 2nd fraction, since 63 × 10 = 630,
60/63 = 60 × 10/63 × 10 = 600/630
Subtract the two like fractions:
1680/630 - 600/630 = 1680 - 600/630 = 1080/630
After reducing the fraction, the answer is 12/7
In mixed form: 15/7

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