Add 84/30 and 1/21
1st number: 2 24/30, 2nd number: 1/21
84/30 + 1/21 is 299/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
84/30 = 84 × 7/30 × 7 = 588/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
1/21 = 1 × 10/21 × 10 = 10/210 - Add the two like fractions:
588/210 + 10/210 = 588 + 10/210 = 598/210 - 598/210 simplified gives 299/105
- So, 84/30 + 1/21 = 299/105
In mixed form: 289/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/30+2/21 84/60+1/21 84/30+1/42 84/30+3/21 84/90+1/21 84/30+1/63 84/30+5/21 84/30+7/21