Subtract 16/42 from 21/5
1st number: 4 1/5, 2nd number: 16/42
21/5 - 16/42 is 401/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 5 × 42 = 210,
21/5 = 21 × 42/5 × 42 = 882/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
16/42 = 16 × 5/42 × 5 = 80/210 - Subtract the two like fractions:
882/210 - 80/210 = 882 - 80/210 = 802/210 - After reducing the fraction, the answer is 401/105
- In mixed form: 386/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/5-16/42 21/5-32/42 21/10-16/42 21/5-16/84 63/5-16/42 21/5-48/42 21/15-16/42 21/5-80/42 21/25-16/42 21/35-16/42