Subtract 16/7 from 4/90, Solve 4/90

Subtract 16/7 from 4/90

1^st number: 4/90, 2^nd number: 2 2/7

4/90 - 16/7 is -706/315.

Find the least common denominator or LCM of the two denominators:
LCM of 90 and 7 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 90 × 7 = 630,
4/90 = 4 × 7/90 × 7 = 28/630
Likewise, for the 2nd fraction, since 7 × 90 = 630,
16/7 = 16 × 90/7 × 90 = 1440/630
Subtract the two like fractions:
28/630 - 1440/630 = 28 - 1440/630 = -1412/630
After reducing the fraction, the answer is -706/315

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