Subtract 45/30 from 50/21
1st number: 2 8/21, 2nd number: 1 15/30
50/21 - 45/30 is 37/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
50/21 = 50 × 10/21 × 10 = 500/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
45/30 = 45 × 7/30 × 7 = 315/210 - Subtract the two like fractions:
500/210 - 315/210 = 500 - 315/210 = 185/210 - After reducing the fraction, the answer is 37/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/21-90/30 50/42-45/30 50/21-45/60 50/63-45/30 50/21-45/90