Subtract 70/49 from 63/45, Solve 1 18/45

Subtract 70/49 from 63/45

1^st number: 1 18/45, 2^nd number: 1 21/49

63/45 - 70/49 is -1/35.

Find the least common denominator or LCM of the two denominators:
LCM of 45 and 49 is 2205

Next, find the equivalent fraction of both fractional numbers with denominator 2205
For the 1st fraction, since 45 × 49 = 2205,
63/45 = 63 × 49/45 × 49 = 3087/2205
Likewise, for the 2nd fraction, since 49 × 45 = 2205,
70/49 = 70 × 45/49 × 45 = 3150/2205
Subtract the two like fractions:
3087/2205 - 3150/2205 = 3087 - 3150/2205 = -63/2205
After reducing the fraction, the answer is -1/35

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