Add 84/21 and 90/8
1st number: 4 0/21, 2nd number: 11 2/8
84/21 + 90/8 is 61/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 8 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 21 × 8 = 168,
84/21 = 84 × 8/21 × 8 = 672/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
90/8 = 90 × 21/8 × 21 = 1890/168 - Add the two like fractions:
672/168 + 1890/168 = 672 + 1890/168 = 2562/168 - 2562/168 simplified gives 61/4
- So, 84/21 + 90/8 = 61/4
In mixed form: 151/4
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