Add 12/40 and 81/7
1st number: 12/40, 2nd number: 11 4/7
12/40 + 81/7 is 831/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 7 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 40 × 7 = 280,
12/40 = 12 × 7/40 × 7 = 84/280 - Likewise, for the 2nd fraction, since 7 × 40 = 280,
81/7 = 81 × 40/7 × 40 = 3240/280 - Add the two like fractions:
84/280 + 3240/280 = 84 + 3240/280 = 3324/280 - 3324/280 simplified gives 831/70
- So, 12/40 + 81/7 = 831/70
In mixed form: 1161/70
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