Add 50/21 and 40/42
1st number: 2 8/21, 2nd number: 40/42
50/21 + 40/42 is 10/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 42 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
50/21 = 50 × 2/21 × 2 = 100/42 - Likewise, for the 2nd fraction, since 42 × 1 = 42,
40/42 = 40 × 1/42 × 1 = 40/42 - Add the two like fractions:
100/42 + 40/42 = 100 + 40/42 = 140/42 - 140/42 simplified gives 10/3
- So, 50/21 + 40/42 = 10/3
In mixed form: 31/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/21+80/42 50/42+40/42 50/21+40/84 50/63+40/42