Add 21/84 and 45/12
1st number: 21/84, 2nd number: 3 9/12
21/84 + 45/12 is 4/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 12 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 84 × 1 = 84,
21/84 = 21 × 1/84 × 1 = 21/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
45/12 = 45 × 7/12 × 7 = 315/84 - Add the two like fractions:
21/84 + 315/84 = 21 + 315/84 = 336/84 - 336/84 simplified gives 4/1
- So, 21/84 + 45/12 = 4/1
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