Add 81/84 and 7/30
81/84 + 7/30 is 503/420.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 30 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
81/84 = 81 × 5/84 × 5 = 405/420 - Likewise, for the 2nd fraction, since 30 × 14 = 420,
7/30 = 7 × 14/30 × 14 = 98/420 - Add the two like fractions:
405/420 + 98/420 = 405 + 98/420 = 503/420 - So, 81/84 + 7/30 = 503/420
In mixed form: 183/420
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