Subtract 90/63 from 84/45, Solve 1 39/45

Subtract 90/63 from 84/45

1^st number: 1 39/45, 2^nd number: 1 27/63

84/45 - 90/63 is 46/105.

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

Next, find the equivalent fraction of both fractional numbers with denominator 315
For the 1st fraction, since 45 × 7 = 315,
84/45 = 84 × 7/45 × 7 = 588/315
Likewise, for the 2nd fraction, since 63 × 5 = 315,
90/63 = 90 × 5/63 × 5 = 450/315
Subtract the two like fractions:
588/315 - 450/315 = 588 - 450/315 = 138/315
After reducing the fraction, the answer is 46/105

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