Subtract 1/36 from 21/30
21/30 - 1/36 is 121/180.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 36 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 30 × 6 = 180,
21/30 = 21 × 6/30 × 6 = 126/180 - Likewise, for the 2nd fraction, since 36 × 5 = 180,
1/36 = 1 × 5/36 × 5 = 5/180 - Subtract the two like fractions:
126/180 - 5/180 = 126 - 5/180 = 121/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/30-1/36 21/30-2/36 21/60-1/36 21/30-1/72 63/30-1/36 21/30-3/36 21/90-1/36 21/30-5/36 21/30-7/36