Add 18/21 and 84/40
1st number: 18/21, 2nd number: 2 4/40
18/21 + 84/40 is 207/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 21 × 40 = 840,
18/21 = 18 × 40/21 × 40 = 720/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
84/40 = 84 × 21/40 × 21 = 1764/840 - Add the two like fractions:
720/840 + 1764/840 = 720 + 1764/840 = 2484/840 - 2484/840 simplified gives 207/70
- So, 18/21 + 84/40 = 207/70
In mixed form: 267/70
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