Add 84/21 and 10/15
1st number: 4 0/21, 2nd number: 10/15
84/21 + 10/15 is 14/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 15 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
84/21 = 84 × 5/21 × 5 = 420/105 - Likewise, for the 2nd fraction, since 15 × 7 = 105,
10/15 = 10 × 7/15 × 7 = 70/105 - Add the two like fractions:
420/105 + 70/105 = 420 + 70/105 = 490/105 - 490/105 simplified gives 14/3
- So, 84/21 + 10/15 = 14/3
In mixed form: 42/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/21+20/15 84/42+10/15 84/21+10/30 84/21+30/15 84/63+10/15 84/21+10/45 84/21+50/15 84/21+10/75 84/21+70/15