Subtract 90/30 from 20/56
1st number: 20/56, 2nd number: 3 0/30
20/56 - 90/30 is -37/14.
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,
20/56 = 20 × 15/56 × 15 = 300/840 - Likewise, for the 2nd fraction, since 30 × 28 = 840,
90/30 = 90 × 28/30 × 28 = 2520/840 - Subtract the two like fractions:
300/840 - 2520/840 = 300 - 2520/840 = -2220/840 - After reducing the fraction, the answer is -37/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/56-90/30 20/56-90/60 60/56-90/30