Subtract 9/10 from 4/20
4/20 - 9/10 is -7/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 10 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 20 × 1 = 20,
4/20 = 4 × 1/20 × 1 = 4/20 - Likewise, for the 2nd fraction, since 10 × 2 = 20,
9/10 = 9 × 2/10 × 2 = 18/20 - Subtract the two like fractions:
4/20 - 18/20 = 4 - 18/20 = -14/20 - After reducing the fraction, the answer is -7/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/20-9/10 4/20-18/10 4/40-9/10 4/20-9/20 12/20-9/10 4/20-27/10 4/60-9/10 4/20-9/30 4/20-45/10 4/20-9/50 28/20-9/10 4/20-63/10 4/20-9/70