Add 90/21 and 84/63
1st number: 4 6/21, 2nd number: 1 21/63
90/21 + 84/63 is 118/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 63 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 21 × 3 = 63,
90/21 = 90 × 3/21 × 3 = 270/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
84/63 = 84 × 1/63 × 1 = 84/63 - Add the two like fractions:
270/63 + 84/63 = 270 + 84/63 = 354/63 - 354/63 simplified gives 118/21
- So, 90/21 + 84/63 = 118/21
In mixed form: 513/21
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