Subtract 2/90 from 5/7, Solve 5/7

Subtract 2/90 from 5/7

5/7 - 2/90 is 218/315.

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

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 7 × 90 = 630,
5/7 = 5 × 90/7 × 90 = 450/630
Likewise, for the 2nd fraction, since 90 × 7 = 630,
2/90 = 2 × 7/90 × 7 = 14/630
Subtract the two like fractions:
450/630 - 14/630 = 450 - 14/630 = 436/630
After reducing the fraction, the answer is 218/315

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