Subtract 90/42 from 56/20
1st number: 2 16/20, 2nd number: 2 6/42
56/20 - 90/42 is 23/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 42 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
56/20 = 56 × 21/20 × 21 = 1176/420 - Likewise, for the 2nd fraction, since 42 × 10 = 420,
90/42 = 90 × 10/42 × 10 = 900/420 - Subtract the two like fractions:
1176/420 - 900/420 = 1176 - 900/420 = 276/420 - After reducing the fraction, the answer is 23/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/40-90/42 56/20-90/84 56/60-90/42