Add 84/21 and 98/30
1st number: 4 0/21, 2nd number: 3 8/30
84/21 + 98/30 is 109/15.
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,
98/30 = 98 × 7/30 × 7 = 686/210 - Add the two like fractions:
840/210 + 686/210 = 840 + 686/210 = 1526/210 - 1526/210 simplified gives 109/15
- So, 84/21 + 98/30 = 109/15
In mixed form: 74/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/42+98/30 84/21+98/60 84/63+98/30 84/21+98/90