Subtract 35/9 from 42/20
1st number: 2 2/20, 2nd number: 3 8/9
42/20 - 35/9 is -161/90.
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,
42/20 = 42 × 9/20 × 9 = 378/180 - Likewise, for the 2nd fraction, since 9 × 20 = 180,
35/9 = 35 × 20/9 × 20 = 700/180 - Subtract the two like fractions:
378/180 - 700/180 = 378 - 700/180 = -322/180 - After reducing the fraction, the answer is -161/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/20-35/9 42/20-70/9 42/40-35/9 42/20-35/18 42/60-35/9 42/20-35/27 42/20-35/45 42/20-35/63