Subtract 30/7 from 63/45, Solve 1 18/45

Subtract 30/7 from 63/45

1^st number: 1 18/45, 2^nd number: 4 2/7

63/45 - 30/7 is -101/35.

Find the least common denominator or LCM of the two denominators:
LCM of 45 and 7 is 315

Next, find the equivalent fraction of both fractional numbers with denominator 315
For the 1st fraction, since 45 × 7 = 315,
63/45 = 63 × 7/45 × 7 = 441/315
Likewise, for the 2nd fraction, since 7 × 45 = 315,
30/7 = 30 × 45/7 × 45 = 1350/315
Subtract the two like fractions:
441/315 - 1350/315 = 441 - 1350/315 = -909/315
After reducing the fraction, the answer is -101/35

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