Add 84/21 and 40/15
1st number: 4 0/21, 2nd number: 2 10/15
84/21 + 40/15 is 20/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 15 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
84/21 = 84 × 5/21 × 5 = 420/105 - Likewise, for the 2nd fraction, since 15 × 7 = 105,
40/15 = 40 × 7/15 × 7 = 280/105 - Add the two like fractions:
420/105 + 280/105 = 420 + 280/105 = 700/105 - 700/105 simplified gives 20/3
- So, 84/21 + 40/15 = 20/3
In mixed form: 62/3
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