Subtract 56/20 from 70/45
1st number: 1 25/45, 2nd number: 2 16/20
70/45 - 56/20 is -56/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,
70/45 = 70 × 4/45 × 4 = 280/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
56/20 = 56 × 9/20 × 9 = 504/180 - Subtract the two like fractions:
280/180 - 504/180 = 280 - 504/180 = -224/180 - After reducing the fraction, the answer is -56/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/90-56/20 70/45-56/40 70/45-56/60