Subtract 20/70 from 16/9, Solve 1 7/9

Subtract 20/70 from 16/9

1^st number: 1 7/9, 2^nd number: 20/70

16/9 - 20/70 is 94/63.

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,
16/9 = 16 × 70/9 × 70 = 1120/630
Likewise, for the 2nd fraction, since 70 × 9 = 630,
20/70 = 20 × 9/70 × 9 = 180/630
Subtract the two like fractions:
1120/630 - 180/630 = 1120 - 180/630 = 940/630
After reducing the fraction, the answer is 94/63
In mixed form: 131/63

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