Subtract 4/56 from 20/30
20/30 - 4/56 is 25/42.
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,
20/30 = 20 × 28/30 × 28 = 560/840 - Likewise, for the 2nd fraction, since 56 × 15 = 840,
4/56 = 4 × 15/56 × 15 = 60/840 - Subtract the two like fractions:
560/840 - 60/840 = 560 - 60/840 = 500/840 - After reducing the fraction, the answer is 25/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/30-4/56 20/30-8/56 20/60-4/56 60/30-4/56 20/30-12/56 20/90-4/56 20/30-20/56 20/30-28/56