Subtract 21/20 from 3/30
1st number: 3/30, 2nd number: 1 1/20
3/30 - 21/20 is -19/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 30 × 2 = 60,
3/30 = 3 × 2/30 × 2 = 6/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
21/20 = 21 × 3/20 × 3 = 63/60 - Subtract the two like fractions:
6/60 - 63/60 = 6 - 63/60 = -57/60 - After reducing the fraction, the answer is -19/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/30-21/20 3/30-42/20 3/60-21/20 3/30-21/40 9/30-21/20 3/30-63/20 3/90-21/20 3/30-21/60 15/30-21/20 21/30-21/20