Subtract 20/90 from 1/49
1/49 - 20/90 is -89/441.
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,
1/49 = 1 × 90/49 × 90 = 90/4410 - Likewise, for the 2nd fraction, since 90 × 49 = 4410,
20/90 = 20 × 49/90 × 49 = 980/4410 - Subtract the two like fractions:
90/4410 - 980/4410 = 90 - 980/4410 = -890/4410 - After reducing the fraction, the answer is -89/441
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/49-20/90 1/49-40/90 1/98-20/90 3/49-20/90 1/49-60/90 5/49-20/90 7/49-20/90