Add 72/84 and 21/7
1st number: 72/84, 2nd number: 3 0/7
72/84 + 21/7 is 27/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 7 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 84 × 1 = 84,
72/84 = 72 × 1/84 × 1 = 72/84 - Likewise, for the 2nd fraction, since 7 × 12 = 84,
21/7 = 21 × 12/7 × 12 = 252/84 - Add the two like fractions:
72/84 + 252/84 = 72 + 252/84 = 324/84 - 324/84 simplified gives 27/7
- So, 72/84 + 21/7 = 27/7
In mixed form: 36/7
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