Add 8/10 and 21/84
8/10 + 21/84 is 21/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 10 × 42 = 420,
8/10 = 8 × 42/10 × 42 = 336/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
21/84 = 21 × 5/84 × 5 = 105/420 - Add the two like fractions:
336/420 + 105/420 = 336 + 105/420 = 441/420 - 441/420 simplified gives 21/20
- So, 8/10 + 21/84 = 21/20
In mixed form: 11/20
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