Subtract 40/90 from 49/20
1st number: 2 9/20, 2nd number: 40/90
49/20 - 40/90 is 361/180.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
49/20 = 49 × 9/20 × 9 = 441/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
40/90 = 40 × 2/90 × 2 = 80/180 - Subtract the two like fractions:
441/180 - 80/180 = 441 - 80/180 = 361/180 - In mixed form: 21/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/20-40/90 49/20-80/90 49/40-40/90 49/60-40/90