Subtract 12/3 from 21/20
1st number: 1 1/20, 2nd number: 4 0/3
21/20 - 12/3 is -59/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 3 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
21/20 = 21 × 3/20 × 3 = 63/60 - Likewise, for the 2nd fraction, since 3 × 20 = 60,
12/3 = 12 × 20/3 × 20 = 240/60 - Subtract the two like fractions:
63/60 - 240/60 = 63 - 240/60 = -177/60 - After reducing the fraction, the answer is -59/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/20-12/3 21/20-24/3 21/40-12/3 21/20-12/6 63/20-12/3 21/20-36/3 21/60-12/3 21/20-12/9 21/20-60/3 21/20-12/15 21/20-84/3 21/20-12/21