Subtract 80/70 from 60/9, Solve 6 6/9

Subtract 80/70 from 60/9

1^st number: 6 6/9, 2^nd number: 1 10/70

60/9 - 80/70 is 116/21.

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

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 9 × 70 = 630,
60/9 = 60 × 70/9 × 70 = 4200/630
Likewise, for the 2nd fraction, since 70 × 9 = 630,
80/70 = 80 × 9/70 × 9 = 720/630
Subtract the two like fractions:
4200/630 - 720/630 = 4200 - 720/630 = 3480/630
After reducing the fraction, the answer is 116/21
In mixed form: 511/21

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