Subtract 20/45 from 9/56
9/56 - 20/45 is -143/504.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 45 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 56 × 45 = 2520,
9/56 = 9 × 45/56 × 45 = 405/2520 - Likewise, for the 2nd fraction, since 45 × 56 = 2520,
20/45 = 20 × 56/45 × 56 = 1120/2520 - Subtract the two like fractions:
405/2520 - 1120/2520 = 405 - 1120/2520 = -715/2520 - After reducing the fraction, the answer is -143/504
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/56-20/45 9/56-40/45 9/56-20/90 27/56-20/45 9/56-60/45 45/56-20/45 63/56-20/45