Add 84/21 and 10/30
1st number: 4 0/21, 2nd number: 10/30
84/21 + 10/30 is 13/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
84/21 = 84 × 10/21 × 10 = 840/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
10/30 = 10 × 7/30 × 7 = 70/210 - Add the two like fractions:
840/210 + 70/210 = 840 + 70/210 = 910/210 - 910/210 simplified gives 13/3
- So, 84/21 + 10/30 = 13/3
In mixed form: 41/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/21+20/30 84/42+10/30 84/21+10/60 84/63+10/30 84/21+10/90 84/21+50/30 84/21+70/30