Subtract 20/8 from 45/54
1st number: 45/54, 2nd number: 2 4/8
45/54 - 20/8 is -5/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 8 is 216
Next, find the equivalent fraction of both fractional numbers with denominator 216 - For the 1st fraction, since 54 × 4 = 216,
45/54 = 45 × 4/54 × 4 = 180/216 - Likewise, for the 2nd fraction, since 8 × 27 = 216,
20/8 = 20 × 27/8 × 27 = 540/216 - Subtract the two like fractions:
180/216 - 540/216 = 180 - 540/216 = -360/216 - After reducing the fraction, the answer is -5/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/54-20/8 45/54-40/8 45/54-20/16 45/54-60/8 45/54-20/24 45/54-20/40 45/54-20/56