Add 21/12 and 75/42
1st number: 1 9/12, 2nd number: 1 33/42
21/12 + 75/42 is 99/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 42 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
21/12 = 21 × 7/12 × 7 = 147/84 - Likewise, for the 2nd fraction, since 42 × 2 = 84,
75/42 = 75 × 2/42 × 2 = 150/84 - Add the two like fractions:
147/84 + 150/84 = 147 + 150/84 = 297/84 - 297/84 simplified gives 99/28
- So, 21/12 + 75/42 = 99/28
In mixed form: 315/28
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