Subtract 35/9 from 28/70, Solve 28/70

Subtract 35/9 from 28/70

1^st number: 28/70, 2^nd number: 3 8/9

28/70 - 35/9 is -157/45.

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,
28/70 = 28 × 9/70 × 9 = 252/630
Likewise, for the 2nd fraction, since 9 × 70 = 630,
35/9 = 35 × 70/9 × 70 = 2450/630
Subtract the two like fractions:
252/630 - 2450/630 = 252 - 2450/630 = -2198/630
After reducing the fraction, the answer is -157/45

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