Subtract 20/8 from 9/30
1st number: 9/30, 2nd number: 2 4/8
9/30 - 20/8 is -11/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 8 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 30 × 4 = 120,
9/30 = 9 × 4/30 × 4 = 36/120 - Likewise, for the 2nd fraction, since 8 × 15 = 120,
20/8 = 20 × 15/8 × 15 = 300/120 - Subtract the two like fractions:
36/120 - 300/120 = 36 - 300/120 = -264/120 - After reducing the fraction, the answer is -11/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/30-20/8 9/30-40/8 9/60-20/8 9/30-20/16 27/30-20/8 9/30-60/8 9/90-20/8 9/30-20/24 45/30-20/8 9/30-20/40 63/30-20/8 9/30-20/56