Subtract 40/36 from 30/28
1st number: 1 2/28, 2nd number: 1 4/36
30/28 - 40/36 is -5/126.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 36 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 28 × 9 = 252,
30/28 = 30 × 9/28 × 9 = 270/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
40/36 = 40 × 7/36 × 7 = 280/252 - Subtract the two like fractions:
270/252 - 280/252 = 270 - 280/252 = -10/252 - After reducing the fraction, the answer is -5/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/28-40/36 30/28-80/36 30/56-40/36 30/28-40/72 90/28-40/36 30/84-40/36