Subtract 80/49 from 60/21
1st number: 2 18/21, 2nd number: 1 31/49
60/21 - 80/49 is 60/49.
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,
60/21 = 60 × 7/21 × 7 = 420/147 - Likewise, for the 2nd fraction, since 49 × 3 = 147,
80/49 = 80 × 3/49 × 3 = 240/147 - Subtract the two like fractions:
420/147 - 240/147 = 420 - 240/147 = 180/147 - After reducing the fraction, the answer is 60/49
- In mixed form: 111/49
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/42-80/49 60/21-80/98 60/63-80/49