Subtract 28/8 from 98/18, Solve 5 8/18

Subtract 28/8 from 98/18

1^st number: 5 8/18, 2^nd number: 3 4/8

98/18 - 28/8 is 35/18.

Find the least common denominator or LCM of the two denominators:
LCM of 18 and 8 is 72

Next, find the equivalent fraction of both fractional numbers with denominator 72
For the 1st fraction, since 18 × 4 = 72,
98/18 = 98 × 4/18 × 4 = 392/72
Likewise, for the 2nd fraction, since 8 × 9 = 72,
28/8 = 28 × 9/8 × 9 = 252/72
Subtract the two like fractions:
392/72 - 252/72 = 392 - 252/72 = 140/72
After reducing the fraction, the answer is 35/18
In mixed form: 117/18

MathStep (Works offline)

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