Subtract 84/70 from 4/18, Solve 4/18

Subtract 84/70 from 4/18

1^st number: 4/18, 2^nd number: 1 14/70

4/18 - 84/70 is -44/45.

Find the least common denominator or LCM of the two denominators:
LCM of 18 and 70 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 18 × 35 = 630,
4/18 = 4 × 35/18 × 35 = 140/630
Likewise, for the 2nd fraction, since 70 × 9 = 630,
84/70 = 84 × 9/70 × 9 = 756/630
Subtract the two like fractions:
140/630 - 756/630 = 140 - 756/630 = -616/630
After reducing the fraction, the answer is -44/45

MathStep (Works offline)

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