Subtract 45/56 from 7/30
7/30 - 45/56 is -479/840.
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,
7/30 = 7 × 28/30 × 28 = 196/840 - Likewise, for the 2nd fraction, since 56 × 15 = 840,
45/56 = 45 × 15/56 × 15 = 675/840 - Subtract the two like fractions:
196/840 - 675/840 = 196 - 675/840 = -479/840
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/30-45/56 7/30-90/56 7/60-45/56 21/30-45/56 7/90-45/56 35/30-45/56 49/30-45/56