Subtract 21/30 from 1/56
1/56 - 21/30 is -191/280.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 30 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 56 × 15 = 840,
1/56 = 1 × 15/56 × 15 = 15/840 - Likewise, for the 2nd fraction, since 30 × 28 = 840,
21/30 = 21 × 28/30 × 28 = 588/840 - Subtract the two like fractions:
15/840 - 588/840 = 15 - 588/840 = -573/840 - After reducing the fraction, the answer is -191/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/56-21/30 1/56-42/30 1/56-21/60 3/56-21/30 1/56-63/30 1/56-21/90 5/56-21/30 7/56-21/30