Subtract 90/70 from 5/9, Solve 5/9 - 1 20/70 as a fraction

Subtract 90/70 from 5/9

1^st number: 5/9, 2^nd number: 1 20/70

5/9 - 90/70 is -46/63.

Find the least common denominator or LCM of the two denominators:
LCM of 9 and 70 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 9 × 70 = 630,
5/9 = 5 × 70/9 × 70 = 350/630
Likewise, for the 2nd fraction, since 70 × 9 = 630,
90/70 = 90 × 9/70 × 9 = 810/630
Subtract the two like fractions:
350/630 - 810/630 = 350 - 810/630 = -460/630
After reducing the fraction, the answer is -46/63

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