Add 15/84 and 40/21
1st number: 15/84, 2nd number: 1 19/21
15/84 + 40/21 is 25/12.
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,
15/84 = 15 × 1/84 × 1 = 15/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
40/21 = 40 × 4/21 × 4 = 160/84 - Add the two like fractions:
15/84 + 160/84 = 15 + 160/84 = 175/84 - 175/84 simplified gives 25/12
- So, 15/84 + 40/21 = 25/12
In mixed form: 21/12
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