Subtract 3/9 from 80/70, Solve 1 10/70

Subtract 3/9 from 80/70

1^st number: 1 10/70, 2^nd number: 3/9

80/70 - 3/9 is 17/21.

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,
80/70 = 80 × 9/70 × 9 = 720/630
Likewise, for the 2nd fraction, since 9 × 70 = 630,
3/9 = 3 × 70/9 × 70 = 210/630
Subtract the two like fractions:
720/630 - 210/630 = 720 - 210/630 = 510/630
After reducing the fraction, the answer is 17/21

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