Subtract 12/20 from 40/30
1st number: 1 10/30, 2nd number: 12/20
40/30 - 12/20 is 11/15.
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,
40/30 = 40 × 2/30 × 2 = 80/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
12/20 = 12 × 3/20 × 3 = 36/60 - Subtract the two like fractions:
80/60 - 36/60 = 80 - 36/60 = 44/60 - After reducing the fraction, the answer is 11/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/30-12/20 40/30-24/20 40/60-12/20 40/30-12/40 40/30-36/20 40/90-12/20 40/30-12/60 40/30-60/20 40/30-84/20