Subtract 7/70 from 28/9, Solve 3 1/9

Subtract 7/70 from 28/9

1^st number: 3 1/9, 2^nd number: 7/70

28/9 - 7/70 is 271/90.

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,
28/9 = 28 × 70/9 × 70 = 1960/630
Likewise, for the 2nd fraction, since 70 × 9 = 630,
7/70 = 7 × 9/70 × 9 = 63/630
Subtract the two like fractions:
1960/630 - 63/630 = 1960 - 63/630 = 1897/630
After reducing the fraction, the answer is 271/90
In mixed form: 31/90

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