Add 72/15 and 81/84
1st number: 4 12/15, 2nd number: 81/84
72/15 + 81/84 is 807/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 15 × 28 = 420,
72/15 = 72 × 28/15 × 28 = 2016/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
81/84 = 81 × 5/84 × 5 = 405/420 - Add the two like fractions:
2016/420 + 405/420 = 2016 + 405/420 = 2421/420 - 2421/420 simplified gives 807/140
- So, 72/15 + 81/84 = 807/140
In mixed form: 5107/140
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