Add 81/84 and 72/10
1st number: 81/84, 2nd number: 7 2/10
81/84 + 72/10 is 1143/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 10 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
81/84 = 81 × 5/84 × 5 = 405/420 - Likewise, for the 2nd fraction, since 10 × 42 = 420,
72/10 = 72 × 42/10 × 42 = 3024/420 - Add the two like fractions:
405/420 + 3024/420 = 405 + 3024/420 = 3429/420 - 3429/420 simplified gives 1143/140
- So, 81/84 + 72/10 = 1143/140
In mixed form: 823/140
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