Subtract 20/6 from 8/45
1st number: 8/45, 2nd number: 3 2/6
8/45 - 20/6 is -142/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 6 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 45 × 2 = 90,
8/45 = 8 × 2/45 × 2 = 16/90 - Likewise, for the 2nd fraction, since 6 × 15 = 90,
20/6 = 20 × 15/6 × 15 = 300/90 - Subtract the two like fractions:
16/90 - 300/90 = 16 - 300/90 = -284/90 - After reducing the fraction, the answer is -142/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/45-20/6 8/45-40/6 8/90-20/6 8/45-20/12 24/45-20/6 8/45-60/6 8/45-20/18 40/45-20/6 8/45-20/30 56/45-20/6 8/45-20/42