Subtract 98/18 from 9/21
1st number: 9/21, 2nd number: 5 8/18
9/21 - 98/18 is -316/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 21 × 6 = 126,
9/21 = 9 × 6/21 × 6 = 54/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
98/18 = 98 × 7/18 × 7 = 686/126 - Subtract the two like fractions:
54/126 - 686/126 = 54 - 686/126 = -632/126 - After reducing the fraction, the answer is -316/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/21-98/18 9/42-98/18 9/21-98/36 27/21-98/18 9/63-98/18 9/21-98/54 45/21-98/18 9/21-98/90 63/21-98/18