Add 12/72 and 21/42
12/72 + 21/42 is 2/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 42 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 72 × 7 = 504,
12/72 = 12 × 7/72 × 7 = 84/504 - Likewise, for the 2nd fraction, since 42 × 12 = 504,
21/42 = 21 × 12/42 × 12 = 252/504 - Add the two like fractions:
84/504 + 252/504 = 84 + 252/504 = 336/504 - 336/504 simplified gives 2/3
- So, 12/72 + 21/42 = 2/3
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