Subtract 30/28 from 20/36
1st number: 20/36, 2nd number: 1 2/28
20/36 - 30/28 is -65/126.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 28 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 36 × 7 = 252,
20/36 = 20 × 7/36 × 7 = 140/252 - Likewise, for the 2nd fraction, since 28 × 9 = 252,
30/28 = 30 × 9/28 × 9 = 270/252 - Subtract the two like fractions:
140/252 - 270/252 = 140 - 270/252 = -130/252 - After reducing the fraction, the answer is -65/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/36-30/28 20/36-60/28 20/72-30/28 20/36-30/56 60/36-30/28 20/36-90/28 20/36-30/84