Add 4/42 and 80/21
1st number: 4/42, 2nd number: 3 17/21
4/42 + 80/21 is 82/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
4/42 = 4 × 1/42 × 1 = 4/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
80/21 = 80 × 2/21 × 2 = 160/42 - Add the two like fractions:
4/42 + 160/42 = 4 + 160/42 = 164/42 - 164/42 simplified gives 82/21
- So, 4/42 + 80/21 = 82/21
In mixed form: 319/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/42+80/21 4/84+80/21 4/42+80/42 12/42+80/21 4/42+80/63 20/42+80/21 28/42+80/21