Subtract 30/8 from 3/20
1st number: 3/20, 2nd number: 3 6/8
3/20 - 30/8 is -18/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 8 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 20 × 2 = 40,
3/20 = 3 × 2/20 × 2 = 6/40 - Likewise, for the 2nd fraction, since 8 × 5 = 40,
30/8 = 30 × 5/8 × 5 = 150/40 - Subtract the two like fractions:
6/40 - 150/40 = 6 - 150/40 = -144/40 - After reducing the fraction, the answer is -18/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/20-30/8 3/20-60/8 3/40-30/8 3/20-30/16 9/20-30/8 3/20-90/8 3/60-30/8 3/20-30/24 15/20-30/8 3/20-30/40 21/20-30/8 3/20-30/56