Subtract 56/4 from 18/45
1st number: 18/45, 2nd number: 14 0/4
18/45 - 56/4 is -68/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 4 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,
18/45 = 18 × 4/45 × 4 = 72/180 - Likewise, for the 2nd fraction, since 4 × 45 = 180,
56/4 = 56 × 45/4 × 45 = 2520/180 - Subtract the two like fractions:
72/180 - 2520/180 = 72 - 2520/180 = -2448/180 - After reducing the fraction, the answer is -68/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/45-56/4 18/90-56/4 18/45-56/8 54/45-56/4 18/45-56/12 90/45-56/4 18/45-56/20 18/45-56/28