Subtract 28/20 from 12/32
1st number: 12/32, 2nd number: 1 8/20
12/32 - 28/20 is -41/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 32 and 20 is 160
Next, find the equivalent fraction of both fractional numbers with denominator 160 - For the 1st fraction, since 32 × 5 = 160,
12/32 = 12 × 5/32 × 5 = 60/160 - Likewise, for the 2nd fraction, since 20 × 8 = 160,
28/20 = 28 × 8/20 × 8 = 224/160 - Subtract the two like fractions:
60/160 - 224/160 = 60 - 224/160 = -164/160 - After reducing the fraction, the answer is -41/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/32-28/20 12/32-56/20 12/64-28/20 12/32-28/40 36/32-28/20 12/32-84/20 12/96-28/20 12/32-28/60 60/32-28/20 84/32-28/20