Subtract 81/56 from 30/36
1st number: 30/36, 2nd number: 1 25/56
30/36 - 81/56 is -103/168.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 56 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 36 × 14 = 504,
30/36 = 30 × 14/36 × 14 = 420/504 - Likewise, for the 2nd fraction, since 56 × 9 = 504,
81/56 = 81 × 9/56 × 9 = 729/504 - Subtract the two like fractions:
420/504 - 729/504 = 420 - 729/504 = -309/504 - After reducing the fraction, the answer is -103/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/36-81/56 30/72-81/56 90/36-81/56