Subtract 20/63 from 84/70, Solve 1 14/70

Subtract 20/63 from 84/70

1^st number: 1 14/70, 2^nd number: 20/63

84/70 - 20/63 is 278/315.

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,
84/70 = 84 × 9/70 × 9 = 756/630
Likewise, for the 2nd fraction, since 63 × 10 = 630,
20/63 = 20 × 10/63 × 10 = 200/630
Subtract the two like fractions:
756/630 - 200/630 = 756 - 200/630 = 556/630
After reducing the fraction, the answer is 278/315

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad