Add 7/84 and 81/20
1st number: 7/84, 2nd number: 4 1/20
7/84 + 81/20 is 62/15.
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,
7/84 = 7 × 5/84 × 5 = 35/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
81/20 = 81 × 21/20 × 21 = 1701/420 - Add the two like fractions:
35/420 + 1701/420 = 35 + 1701/420 = 1736/420 - 1736/420 simplified gives 62/15
- So, 7/84 + 81/20 = 62/15
In mixed form: 42/15
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