Add 84/14 and 90/21
1st number: 6 0/14, 2nd number: 4 6/21
84/14 + 90/21 is 72/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 14 × 3 = 42,
84/14 = 84 × 3/14 × 3 = 252/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
90/21 = 90 × 2/21 × 2 = 180/42 - Add the two like fractions:
252/42 + 180/42 = 252 + 180/42 = 432/42 - 432/42 simplified gives 72/7
- So, 84/14 + 90/21 = 72/7
In mixed form: 102/7
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