Subtract 30/20 from 12/16
1st number: 12/16, 2nd number: 1 10/20
12/16 - 30/20 is -3/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 20 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 16 × 5 = 80,
12/16 = 12 × 5/16 × 5 = 60/80 - Likewise, for the 2nd fraction, since 20 × 4 = 80,
30/20 = 30 × 4/20 × 4 = 120/80 - Subtract the two like fractions:
60/80 - 120/80 = 60 - 120/80 = -60/80 - After reducing the fraction, the answer is -3/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/16-30/20 12/16-60/20 12/32-30/20 12/16-30/40 36/16-30/20 12/16-90/20 12/48-30/20 12/16-30/60 60/16-30/20 12/80-30/20 84/16-30/20