Subtract 90/20 from 3/8
1st number: 3/8, 2nd number: 4 10/20
3/8 - 90/20 is -33/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 20 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 8 × 5 = 40,
3/8 = 3 × 5/8 × 5 = 15/40 - Likewise, for the 2nd fraction, since 20 × 2 = 40,
90/20 = 90 × 2/20 × 2 = 180/40 - Subtract the two like fractions:
15/40 - 180/40 = 15 - 180/40 = -165/40 - After reducing the fraction, the answer is -33/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/8-90/20 3/16-90/20 3/8-90/40 9/8-90/20 3/24-90/20 3/8-90/60 15/8-90/20 3/40-90/20 21/8-90/20 3/56-90/20