Subtract 10/7 from 70/90, Solve 70/90

Subtract 10/7 from 70/90

1^st number: 70/90, 2^nd number: 1 3/7

70/90 - 10/7 is -41/63.

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,
70/90 = 70 × 7/90 × 7 = 490/630
Likewise, for the 2nd fraction, since 7 × 90 = 630,
10/7 = 10 × 90/7 × 90 = 900/630
Subtract the two like fractions:
490/630 - 900/630 = 490 - 900/630 = -410/630
After reducing the fraction, the answer is -41/63

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