Subtract 21/6 from 3/45
1st number: 3/45, 2nd number: 3 3/6
3/45 - 21/6 is -103/30.
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,
3/45 = 3 × 2/45 × 2 = 6/90 - Likewise, for the 2nd fraction, since 6 × 15 = 90,
21/6 = 21 × 15/6 × 15 = 315/90 - Subtract the two like fractions:
6/90 - 315/90 = 6 - 315/90 = -309/90 - After reducing the fraction, the answer is -103/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/45-21/6 3/45-42/6 3/90-21/6 3/45-21/12 9/45-21/6 3/45-63/6 3/45-21/18 15/45-21/6 3/45-21/30 21/45-21/6 3/45-21/42