Subtract 98/9 from 36/21
1st number: 1 15/21, 2nd number: 10 8/9
36/21 - 98/9 is -578/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 9 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 21 × 3 = 63,
36/21 = 36 × 3/21 × 3 = 108/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
98/9 = 98 × 7/9 × 7 = 686/63 - Subtract the two like fractions:
108/63 - 686/63 = 108 - 686/63 = -578/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/21-98/9 36/42-98/9 36/21-98/18 36/63-98/9 36/21-98/27 36/21-98/45 36/21-98/63