Subtract 49/40 from 30/20
1st number: 1 10/20, 2nd number: 1 9/40
30/20 - 49/40 is 11/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 20 × 2 = 40,
30/20 = 30 × 2/20 × 2 = 60/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
49/40 = 49 × 1/40 × 1 = 49/40 - Subtract the two like fractions:
60/40 - 49/40 = 60 - 49/40 = 11/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/20-49/40 30/20-98/40 30/40-49/40 30/20-49/80 90/20-49/40 30/60-49/40