Subtract 90/60 from 18/56
1st number: 18/56, 2nd number: 1 30/60
18/56 - 90/60 is -33/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 60 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 56 × 15 = 840,
18/56 = 18 × 15/56 × 15 = 270/840 - Likewise, for the 2nd fraction, since 60 × 14 = 840,
90/60 = 90 × 14/60 × 14 = 1260/840 - Subtract the two like fractions:
270/840 - 1260/840 = 270 - 1260/840 = -990/840 - After reducing the fraction, the answer is -33/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/56-90/60 54/56-90/60 90/56-90/60