Add 8/21 and 30/72
8/21 + 30/72 is 67/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 21 × 24 = 504,
8/21 = 8 × 24/21 × 24 = 192/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
30/72 = 30 × 7/72 × 7 = 210/504 - Add the two like fractions:
192/504 + 210/504 = 192 + 210/504 = 402/504 - 402/504 simplified gives 67/84
- So, 8/21 + 30/72 = 67/84
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