Subtract 90/30 from 8/56
1st number: 8/56, 2nd number: 3 0/30
8/56 - 90/30 is -20/7.
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,
8/56 = 8 × 15/56 × 15 = 120/840 - Likewise, for the 2nd fraction, since 30 × 28 = 840,
90/30 = 90 × 28/30 × 28 = 2520/840 - Subtract the two like fractions:
120/840 - 2520/840 = 120 - 2520/840 = -2400/840 - After reducing the fraction, the answer is -20/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/56-90/30 8/56-90/60 24/56-90/30 40/56-90/30