Subtract 16/9 from 63/70, Solve 63/70

Subtract 16/9 from 63/70

1^st number: 63/70, 2^nd number: 1 7/9

63/70 - 16/9 is -79/90.

Find the least common denominator or LCM of the two denominators:
LCM of 70 and 9 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 70 × 9 = 630,
63/70 = 63 × 9/70 × 9 = 567/630
Likewise, for the 2nd fraction, since 9 × 70 = 630,
16/9 = 16 × 70/9 × 70 = 1120/630
Subtract the two like fractions:
567/630 - 1120/630 = 567 - 1120/630 = -553/630
After reducing the fraction, the answer is -79/90

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