Subtract 12/90 from 3/56
3/56 - 12/90 is -67/840.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 90 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 56 × 45 = 2520,
3/56 = 3 × 45/56 × 45 = 135/2520 - Likewise, for the 2nd fraction, since 90 × 28 = 2520,
12/90 = 12 × 28/90 × 28 = 336/2520 - Subtract the two like fractions:
135/2520 - 336/2520 = 135 - 336/2520 = -201/2520 - After reducing the fraction, the answer is -67/840
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/56-12/90 3/56-24/90 9/56-12/90 3/56-36/90 15/56-12/90 3/56-60/90 21/56-12/90 3/56-84/90