Subtract 70/56 from 18/30
1st number: 18/30, 2nd number: 1 14/56
18/30 - 70/56 is -13/20.
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,
18/30 = 18 × 28/30 × 28 = 504/840 - Likewise, for the 2nd fraction, since 56 × 15 = 840,
70/56 = 70 × 15/56 × 15 = 1050/840 - Subtract the two like fractions:
504/840 - 1050/840 = 504 - 1050/840 = -546/840 - After reducing the fraction, the answer is -13/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/30-70/56 18/60-70/56 54/30-70/56 18/90-70/56 90/30-70/56