Subtract 12/16 from 4/20
4/20 - 12/16 is -11/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 16 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 20 × 4 = 80,
4/20 = 4 × 4/20 × 4 = 16/80 - Likewise, for the 2nd fraction, since 16 × 5 = 80,
12/16 = 12 × 5/16 × 5 = 60/80 - Subtract the two like fractions:
16/80 - 60/80 = 16 - 60/80 = -44/80 - After reducing the fraction, the answer is -11/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/20-12/16 4/20-24/16 4/40-12/16 4/20-12/32 12/20-12/16 4/20-36/16 4/60-12/16 4/20-12/48 4/20-60/16 4/20-12/80 28/20-12/16 4/20-84/16