Subtract 1/90 from 28/49
28/49 - 1/90 is 353/630.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 90 is 4410
Next, find the equivalent fraction of both fractional numbers with denominator 4410 - For the 1st fraction, since 49 × 90 = 4410,
28/49 = 28 × 90/49 × 90 = 2520/4410 - Likewise, for the 2nd fraction, since 90 × 49 = 4410,
1/90 = 1 × 49/90 × 49 = 49/4410 - Subtract the two like fractions:
2520/4410 - 49/4410 = 2520 - 49/4410 = 2471/4410 - After reducing the fraction, the answer is 353/630
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/49-1/90 28/49-2/90 28/98-1/90 84/49-1/90 28/49-3/90 28/49-5/90 28/49-7/90