Add 42/72 and 3/84
42/72 + 3/84 is 13/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 84 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 72 × 7 = 504,
42/72 = 42 × 7/72 × 7 = 294/504 - Likewise, for the 2nd fraction, since 84 × 6 = 504,
3/84 = 3 × 6/84 × 6 = 18/504 - Add the two like fractions:
294/504 + 18/504 = 294 + 18/504 = 312/504 - 312/504 simplified gives 13/21
- So, 42/72 + 3/84 = 13/21
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