Subtract 45/50 from 4/20
4/20 - 45/50 is -7/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 50 is 100
Next, find the equivalent fraction of both fractional numbers with denominator 100 - For the 1st fraction, since 20 × 5 = 100,
4/20 = 4 × 5/20 × 5 = 20/100 - Likewise, for the 2nd fraction, since 50 × 2 = 100,
45/50 = 45 × 2/50 × 2 = 90/100 - Subtract the two like fractions:
20/100 - 90/100 = 20 - 90/100 = -70/100 - 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: 8/20-45/50 4/20-90/50 4/40-45/50 12/20-45/50 4/60-45/50 28/20-45/50