Subtract 4/45 from 8/20
8/20 - 4/45 is 14/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 45 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
8/20 = 8 × 9/20 × 9 = 72/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
4/45 = 4 × 4/45 × 4 = 16/180 - Subtract the two like fractions:
72/180 - 16/180 = 72 - 16/180 = 56/180 - After reducing the fraction, the answer is 14/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/20-4/45 8/20-8/45 8/40-4/45 8/20-4/90 24/20-4/45 8/20-12/45 8/60-4/45 40/20-4/45 8/20-20/45 56/20-4/45 8/20-28/45