Subtract 49/9 from 45/20
1st number: 2 5/20, 2nd number: 5 4/9
45/20 - 49/9 is -115/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 9 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
45/20 = 45 × 9/20 × 9 = 405/180 - Likewise, for the 2nd fraction, since 9 × 20 = 180,
49/9 = 49 × 20/9 × 20 = 980/180 - Subtract the two like fractions:
405/180 - 980/180 = 405 - 980/180 = -575/180 - After reducing the fraction, the answer is -115/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/20-49/9 45/20-98/9 45/40-49/9 45/20-49/18 45/60-49/9 45/20-49/27 45/20-49/45 45/20-49/63