Subtract 42/9 from 49/20
1st number: 2 9/20, 2nd number: 4 6/9
49/20 - 42/9 is -133/60.
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,
49/20 = 49 × 9/20 × 9 = 441/180 - Likewise, for the 2nd fraction, since 9 × 20 = 180,
42/9 = 42 × 20/9 × 20 = 840/180 - Subtract the two like fractions:
441/180 - 840/180 = 441 - 840/180 = -399/180 - After reducing the fraction, the answer is -133/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/20-42/9 49/20-84/9 49/40-42/9 49/20-42/18 49/60-42/9 49/20-42/27 49/20-42/45 49/20-42/63