Subtract 10/21 from 2/45
2/45 - 10/21 is -136/315.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 21 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 45 × 7 = 315,
2/45 = 2 × 7/45 × 7 = 14/315 - Likewise, for the 2nd fraction, since 21 × 15 = 315,
10/21 = 10 × 15/21 × 15 = 150/315 - Subtract the two like fractions:
14/315 - 150/315 = 14 - 150/315 = -136/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/45-10/21 2/45-20/21 2/90-10/21 2/45-10/42 6/45-10/21 2/45-30/21 2/45-10/63 10/45-10/21 2/45-50/21 14/45-10/21 2/45-70/21