Subtract 49/8 from 20/90
1st number: 20/90, 2nd number: 6 1/8
20/90 - 49/8 is -425/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 8 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 90 × 4 = 360,
20/90 = 20 × 4/90 × 4 = 80/360 - Likewise, for the 2nd fraction, since 8 × 45 = 360,
49/8 = 49 × 45/8 × 45 = 2205/360 - Subtract the two like fractions:
80/360 - 2205/360 = 80 - 2205/360 = -2125/360 - After reducing the fraction, the answer is -425/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/90-49/8 20/90-98/8 20/90-49/16 60/90-49/8 20/90-49/24 20/90-49/40 20/90-49/56