Subtract 98/30 from 21/7
1st number: 3 0/7, 2nd number: 3 8/30
21/7 - 98/30 is -4/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 7 × 30 = 210,
21/7 = 21 × 30/7 × 30 = 630/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
98/30 = 98 × 7/30 × 7 = 686/210 - Subtract the two like fractions:
630/210 - 686/210 = 630 - 686/210 = -56/210 - After reducing the fraction, the answer is -4/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/7-98/30 21/14-98/30 21/7-98/60 63/7-98/30 21/7-98/90 21/35-98/30 21/49-98/30