Subtract 28/49 from 1/18, Solve 1/18

Subtract 28/49 from 1/18

1/18 - 28/49 is -65/126.

Find the least common denominator or LCM of the two denominators:
LCM of 18 and 49 is 882

Next, find the equivalent fraction of both fractional numbers with denominator 882
For the 1st fraction, since 18 × 49 = 882,
1/18 = 1 × 49/18 × 49 = 49/882
Likewise, for the 2nd fraction, since 49 × 18 = 882,
28/49 = 28 × 18/49 × 18 = 504/882
Subtract the two like fractions:
49/882 - 504/882 = 49 - 504/882 = -455/882
After reducing the fraction, the answer is -65/126

MathStep (Works offline)

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