Add 7/21 and 40/4
1st number: 7/21, 2nd number: 10 0/4
7/21 + 40/4 is 31/3.
Steps for adding 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,
7/21 = 7 × 4/21 × 4 = 28/84 - Likewise, for the 2nd fraction, since 4 × 21 = 84,
40/4 = 40 × 21/4 × 21 = 840/84 - Add the two like fractions:
28/84 + 840/84 = 28 + 840/84 = 868/84 - 868/84 simplified gives 31/3
- So, 7/21 + 40/4 = 31/3
In mixed form: 101/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/21+40/4 7/21+80/4 7/42+40/4 7/21+40/8 7/63+40/4 7/21+40/12 35/21+40/4 7/21+40/20 49/21+40/4 7/21+40/28