Subtract 20/45 from 8/10
8/10 - 20/45 is 16/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 45 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 10 × 9 = 90,
8/10 = 8 × 9/10 × 9 = 72/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
20/45 = 20 × 2/45 × 2 = 40/90 - Subtract the two like fractions:
72/90 - 40/90 = 72 - 40/90 = 32/90 - After reducing the fraction, the answer is 16/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/10-20/45 8/10-40/45 8/20-20/45 8/10-20/90 24/10-20/45 8/10-60/45 8/30-20/45 40/10-20/45 8/50-20/45 56/10-20/45 8/70-20/45