Subtract 30/9 from 18/98, Solve 18/98

Subtract 30/9 from 18/98

1^st number: 18/98, 2^nd number: 3 3/9

18/98 - 30/9 is -463/147.

Find the least common denominator or LCM of the two denominators:
LCM of 98 and 9 is 882

Next, find the equivalent fraction of both fractional numbers with denominator 882
For the 1st fraction, since 98 × 9 = 882,
18/98 = 18 × 9/98 × 9 = 162/882
Likewise, for the 2nd fraction, since 9 × 98 = 882,
30/9 = 30 × 98/9 × 98 = 2940/882
Subtract the two like fractions:
162/882 - 2940/882 = 162 - 2940/882 = -2778/882
After reducing the fraction, the answer is -463/147

MathStep (Works offline)

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