Add 36/21 and 84/90
1st number: 1 15/21, 2nd number: 84/90
36/21 + 84/90 is 278/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 21 × 30 = 630,
36/21 = 36 × 30/21 × 30 = 1080/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
84/90 = 84 × 7/90 × 7 = 588/630 - Add the two like fractions:
1080/630 + 588/630 = 1080 + 588/630 = 1668/630 - 1668/630 simplified gives 278/105
- So, 36/21 + 84/90 = 278/105
In mixed form: 268/105
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