Subtract 20/8 from 5/45
1st number: 5/45, 2nd number: 2 4/8
5/45 - 20/8 is -43/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 8 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 45 × 8 = 360,
5/45 = 5 × 8/45 × 8 = 40/360 - Likewise, for the 2nd fraction, since 8 × 45 = 360,
20/8 = 20 × 45/8 × 45 = 900/360 - Subtract the two like fractions:
40/360 - 900/360 = 40 - 900/360 = -860/360 - After reducing the fraction, the answer is -43/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/45-20/8 5/45-40/8 5/90-20/8 5/45-20/16 15/45-20/8 5/45-60/8 5/45-20/24 25/45-20/8 5/45-20/40 35/45-20/8 5/45-20/56