Subtract 54/45 from 3/20
1st number: 3/20, 2nd number: 1 9/45
3/20 - 54/45 is -21/20.
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,
3/20 = 3 × 9/20 × 9 = 27/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
54/45 = 54 × 4/45 × 4 = 216/180 - Subtract the two like fractions:
27/180 - 216/180 = 27 - 216/180 = -189/180 - After reducing the fraction, the answer is -21/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/20-54/45 3/40-54/45 3/20-54/90 9/20-54/45 3/60-54/45 15/20-54/45 21/20-54/45