Add 81/84 and 6/70
81/84 + 6/70 is 21/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 70 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 70 × 6 = 420,
6/70 = 6 × 6/70 × 6 = 36/420 - Add the two like fractions:
405/420 + 36/420 = 405 + 36/420 = 441/420 - 441/420 simplified gives 21/20
- So, 81/84 + 6/70 = 21/20
In mixed form: 11/20
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