Subtract 4/7 from 2/90, Solve 2/90

Subtract 4/7 from 2/90

2/90 - 4/7 is -173/315.

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,
2/90 = 2 × 7/90 × 7 = 14/630
Likewise, for the 2nd fraction, since 7 × 90 = 630,
4/7 = 4 × 90/7 × 90 = 360/630
Subtract the two like fractions:
14/630 - 360/630 = 14 - 360/630 = -346/630
After reducing the fraction, the answer is -173/315

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