Subtract 21/45 from 70/63, Solve 1 7/63

Subtract 21/45 from 70/63

1^st number: 1 7/63, 2^nd number: 21/45

70/63 - 21/45 is 29/45.

Find the least common denominator or LCM of the two denominators:
LCM of 63 and 45 is 315

Next, find the equivalent fraction of both fractional numbers with denominator 315
For the 1st fraction, since 63 × 5 = 315,
70/63 = 70 × 5/63 × 5 = 350/315
Likewise, for the 2nd fraction, since 45 × 7 = 315,
21/45 = 21 × 7/45 × 7 = 147/315
Subtract the two like fractions:
350/315 - 147/315 = 350 - 147/315 = 203/315
After reducing the fraction, the answer is 29/45

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