Add 84/4 and 10/21
1st number: 21 0/4, 2nd number: 10/21
84/4 + 10/21 is 451/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 4 × 21 = 84,
84/4 = 84 × 21/4 × 21 = 1764/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
10/21 = 10 × 4/21 × 4 = 40/84 - Add the two like fractions:
1764/84 + 40/84 = 1764 + 40/84 = 1804/84 - 1804/84 simplified gives 451/21
- So, 84/4 + 10/21 = 451/21
In mixed form: 2110/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/4+20/21 84/8+10/21 84/4+10/42 84/4+30/21 84/12+10/21 84/4+10/63 84/4+50/21 84/20+10/21 84/4+70/21 84/28+10/21