Subtract 90/7 from 32/20
1st number: 1 12/20, 2nd number: 12 6/7
32/20 - 90/7 is -394/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 7 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
32/20 = 32 × 7/20 × 7 = 224/140 - Likewise, for the 2nd fraction, since 7 × 20 = 140,
90/7 = 90 × 20/7 × 20 = 1800/140 - Subtract the two like fractions:
224/140 - 1800/140 = 224 - 1800/140 = -1576/140 - After reducing the fraction, the answer is -394/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 64/20-90/7 32/40-90/7 32/20-90/14 96/20-90/7 32/60-90/7 32/20-90/21 32/20-90/35 32/20-90/49