Add 9/10 and 21/84
9/10 + 21/84 is 23/20.
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,
9/10 = 9 × 42/10 × 42 = 378/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
21/84 = 21 × 5/84 × 5 = 105/420 - Add the two like fractions:
378/420 + 105/420 = 378 + 105/420 = 483/420 - 483/420 simplified gives 23/20
- So, 9/10 + 21/84 = 23/20
In mixed form: 13/20
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