Subtract 45/30 from 8/20
1st number: 8/20, 2nd number: 1 15/30
8/20 - 45/30 is -11/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 30 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
8/20 = 8 × 3/20 × 3 = 24/60 - Likewise, for the 2nd fraction, since 30 × 2 = 60,
45/30 = 45 × 2/30 × 2 = 90/60 - Subtract the two like fractions:
24/60 - 90/60 = 24 - 90/60 = -66/60 - After reducing the fraction, the answer is -11/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/20-45/30 8/20-90/30 8/40-45/30 8/20-45/60 24/20-45/30 8/60-45/30 8/20-45/90 40/20-45/30 56/20-45/30