Add 3/84 and 21/20
1st number: 3/84, 2nd number: 1 1/20
3/84 + 21/20 is 38/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
3/84 = 3 × 5/84 × 5 = 15/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
21/20 = 21 × 21/20 × 21 = 441/420 - Add the two like fractions:
15/420 + 441/420 = 15 + 441/420 = 456/420 - 456/420 simplified gives 38/35
- So, 3/84 + 21/20 = 38/35
In mixed form: 13/35
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