Add 84/10 and 72/21
1st number: 8 4/10, 2nd number: 3 9/21
84/10 + 72/21 is 414/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 10 × 21 = 210,
84/10 = 84 × 21/10 × 21 = 1764/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
72/21 = 72 × 10/21 × 10 = 720/210 - Add the two like fractions:
1764/210 + 720/210 = 1764 + 720/210 = 2484/210 - 2484/210 simplified gives 414/35
- So, 84/10 + 72/21 = 414/35
In mixed form: 1129/35
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