Add 18/84 and 40/21
1st number: 18/84, 2nd number: 1 19/21
18/84 + 40/21 is 89/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 84 × 1 = 84,
18/84 = 18 × 1/84 × 1 = 18/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
40/21 = 40 × 4/21 × 4 = 160/84 - Add the two like fractions:
18/84 + 160/84 = 18 + 160/84 = 178/84 - 178/84 simplified gives 89/42
- So, 18/84 + 40/21 = 89/42
In mixed form: 25/42
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