Subtract 12/90 from 4/56
4/56 - 12/90 is -13/210.
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,
4/56 = 4 × 45/56 × 45 = 180/2520 - Likewise, for the 2nd fraction, since 90 × 28 = 2520,
12/90 = 12 × 28/90 × 28 = 336/2520 - Subtract the two like fractions:
180/2520 - 336/2520 = 180 - 336/2520 = -156/2520 - After reducing the fraction, the answer is -13/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/56-12/90 4/56-24/90 12/56-12/90 4/56-36/90 20/56-12/90 4/56-60/90 28/56-12/90 4/56-84/90