Subtract 16/70 from 3/18, Solve 3/18

Subtract 16/70 from 3/18

3/18 - 16/70 is -13/210.

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,
3/18 = 3 × 35/18 × 35 = 105/630
Likewise, for the 2nd fraction, since 70 × 9 = 630,
16/70 = 16 × 9/70 × 9 = 144/630
Subtract the two like fractions:
105/630 - 144/630 = 105 - 144/630 = -39/630
After reducing the fraction, the answer is -13/210

MathStep (Works offline)

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