Subtract 20/90 from 30/8
1st number: 3 6/8, 2nd number: 20/90
30/8 - 20/90 is 127/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 90 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 8 × 45 = 360,
30/8 = 30 × 45/8 × 45 = 1350/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
20/90 = 20 × 4/90 × 4 = 80/360 - Subtract the two like fractions:
1350/360 - 80/360 = 1350 - 80/360 = 1270/360 - After reducing the fraction, the answer is 127/36
- In mixed form: 319/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/8-20/90 30/8-40/90 30/16-20/90 90/8-20/90 30/8-60/90 30/24-20/90 30/40-20/90 30/56-20/90