Subtract 30/63 from 1/70, Solve 1/70

Subtract 30/63 from 1/70

1/70 - 30/63 is -97/210.

Find the least common denominator or LCM of the two denominators:
LCM of 70 and 63 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 70 × 9 = 630,
1/70 = 1 × 9/70 × 9 = 9/630
Likewise, for the 2nd fraction, since 63 × 10 = 630,
30/63 = 30 × 10/63 × 10 = 300/630
Subtract the two like fractions:
9/630 - 300/630 = 9 - 300/630 = -291/630
After reducing the fraction, the answer is -97/210

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