Subtract 1/49 from 80/21
1st number: 3 17/21, 2nd number: 1/49
80/21 - 1/49 is 557/147.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 49 is 147
Next, find the equivalent fraction of both fractional numbers with denominator 147 - For the 1st fraction, since 21 × 7 = 147,
80/21 = 80 × 7/21 × 7 = 560/147 - Likewise, for the 2nd fraction, since 49 × 3 = 147,
1/49 = 1 × 3/49 × 3 = 3/147 - Subtract the two like fractions:
560/147 - 3/147 = 560 - 3/147 = 557/147 - In mixed form: 3116/147
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/21-2/49 80/42-1/49 80/21-1/98 80/21-3/49 80/63-1/49 80/21-5/49 80/21-7/49