Subtract 4/56 from 28/90
28/90 - 4/56 is 151/630.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 56 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 90 × 28 = 2520,
28/90 = 28 × 28/90 × 28 = 784/2520 - Likewise, for the 2nd fraction, since 56 × 45 = 2520,
4/56 = 4 × 45/56 × 45 = 180/2520 - Subtract the two like fractions:
784/2520 - 180/2520 = 784 - 180/2520 = 604/2520 - After reducing the fraction, the answer is 151/630
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/90-4/56 28/90-8/56 84/90-4/56 28/90-12/56 28/90-20/56 28/90-28/56