Subtract 20/50 from 75/21
1st number: 3 12/21, 2nd number: 20/50
75/21 - 20/50 is 111/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 50 is 1050
Next, find the equivalent fraction of both fractional numbers with denominator 1050 - For the 1st fraction, since 21 × 50 = 1050,
75/21 = 75 × 50/21 × 50 = 3750/1050 - Likewise, for the 2nd fraction, since 50 × 21 = 1050,
20/50 = 20 × 21/50 × 21 = 420/1050 - Subtract the two like fractions:
3750/1050 - 420/1050 = 3750 - 420/1050 = 3330/1050 - After reducing the fraction, the answer is 111/35
- In mixed form: 36/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/21-40/50 75/42-20/50 75/21-60/50 75/63-20/50