Subtract 81/56 from 8/30
1st number: 8/30, 2nd number: 1 25/56
8/30 - 81/56 is -991/840.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 56 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 30 × 28 = 840,
8/30 = 8 × 28/30 × 28 = 224/840 - Likewise, for the 2nd fraction, since 56 × 15 = 840,
81/56 = 81 × 15/56 × 15 = 1215/840 - Subtract the two like fractions:
224/840 - 1215/840 = 224 - 1215/840 = -991/840
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/30-81/56 8/60-81/56 24/30-81/56 8/90-81/56 40/30-81/56 56/30-81/56