Subtract 8/30 from 12/20
12/20 - 8/30 is 1/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 30 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
12/20 = 12 × 3/20 × 3 = 36/60 - Likewise, for the 2nd fraction, since 30 × 2 = 60,
8/30 = 8 × 2/30 × 2 = 16/60 - Subtract the two like fractions:
36/60 - 16/60 = 36 - 16/60 = 20/60 - After reducing the fraction, the answer is 1/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/20-8/30 12/20-16/30 12/40-8/30 12/20-8/60 36/20-8/30 12/20-24/30 12/60-8/30 12/20-8/90 60/20-8/30 12/20-40/30 84/20-8/30 12/20-56/30