Subtract 98/21 from 7/10, Solve 7/10

Subtract 98/21 from 7/10

1^st number: 7/10, 2^nd number: 4 14/21

7/10 - 98/21 is -119/30.

Find the least common denominator or LCM of the two denominators:
LCM of 10 and 21 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 10 × 21 = 210,
7/10 = 7 × 21/10 × 21 = 147/210
Likewise, for the 2nd fraction, since 21 × 10 = 210,
98/21 = 98 × 10/21 × 10 = 980/210
Subtract the two like fractions:
147/210 - 980/210 = 147 - 980/210 = -833/210
After reducing the fraction, the answer is -119/30

MathStep (Works offline)

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