Subtract 30/4 from 50/21
1st number: 2 8/21, 2nd number: 7 2/4
50/21 - 30/4 is -215/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 4 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
50/21 = 50 × 4/21 × 4 = 200/84 - Likewise, for the 2nd fraction, since 4 × 21 = 84,
30/4 = 30 × 21/4 × 21 = 630/84 - Subtract the two like fractions:
200/84 - 630/84 = 200 - 630/84 = -430/84 - After reducing the fraction, the answer is -215/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/21-60/4 50/42-30/4 50/21-30/8 50/21-90/4 50/63-30/4 50/21-30/12 50/21-30/20 50/21-30/28