Subtract 9/21 from 98/45
1st number: 2 8/45, 2nd number: 9/21
98/45 - 9/21 is 551/315.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 21 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 45 × 7 = 315,
98/45 = 98 × 7/45 × 7 = 686/315 - Likewise, for the 2nd fraction, since 21 × 15 = 315,
9/21 = 9 × 15/21 × 15 = 135/315 - Subtract the two like fractions:
686/315 - 135/315 = 686 - 135/315 = 551/315 - In mixed form: 1236/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/45-18/21 98/90-9/21 98/45-9/42 98/45-27/21 98/45-9/63 98/45-45/21 98/45-63/21