Subtract 80/42 from 21/5
1st number: 4 1/5, 2nd number: 1 38/42
21/5 - 80/42 is 241/105.
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,
80/42 = 80 × 5/42 × 5 = 400/210 - Subtract the two like fractions:
882/210 - 400/210 = 882 - 400/210 = 482/210 - After reducing the fraction, the answer is 241/105
- In mixed form: 231/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/5-80/42 21/10-80/42 21/5-80/84 63/5-80/42 21/15-80/42 21/25-80/42 21/35-80/42