Subtract 72/63 from 63/30, Solve 2 3/30

Subtract 72/63 from 63/30

1^st number: 2 3/30, 2^nd number: 1 9/63

63/30 - 72/63 is 67/70.

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,
63/30 = 63 × 21/30 × 21 = 1323/630
Likewise, for the 2nd fraction, since 63 × 10 = 630,
72/63 = 72 × 10/63 × 10 = 720/630
Subtract the two like fractions:
1323/630 - 720/630 = 1323 - 720/630 = 603/630
After reducing the fraction, the answer is 67/70

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