Subtract 30/32 from 7/20
7/20 - 30/32 is -47/80.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 32 is 160
Next, find the equivalent fraction of both fractional numbers with denominator 160 - For the 1st fraction, since 20 × 8 = 160,
7/20 = 7 × 8/20 × 8 = 56/160 - Likewise, for the 2nd fraction, since 32 × 5 = 160,
30/32 = 30 × 5/32 × 5 = 150/160 - Subtract the two like fractions:
56/160 - 150/160 = 56 - 150/160 = -94/160 - After reducing the fraction, the answer is -47/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/20-30/32 7/20-60/32 7/40-30/32 7/20-30/64 21/20-30/32 7/20-90/32 7/60-30/32 7/20-30/96 35/20-30/32 49/20-30/32