Subtract 12/30 from 20/36
20/36 - 12/30 is 7/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 30 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 36 × 5 = 180,
20/36 = 20 × 5/36 × 5 = 100/180 - Likewise, for the 2nd fraction, since 30 × 6 = 180,
12/30 = 12 × 6/30 × 6 = 72/180 - Subtract the two like fractions:
100/180 - 72/180 = 100 - 72/180 = 28/180 - After reducing the fraction, the answer is 7/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/36-12/30 20/36-24/30 20/72-12/30 20/36-12/60 60/36-12/30 20/36-36/30 20/36-12/90 20/36-60/30 20/36-84/30