Subtract 35/45 from 2/21
2/21 - 35/45 is -43/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 21 × 15 = 315,
2/21 = 2 × 15/21 × 15 = 30/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
35/45 = 35 × 7/45 × 7 = 245/315 - Subtract the two like fractions:
30/315 - 245/315 = 30 - 245/315 = -215/315 - After reducing the fraction, the answer is -43/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/21-35/45 2/21-70/45 2/42-35/45 2/21-35/90 6/21-35/45 2/63-35/45 10/21-35/45 14/21-35/45