Add 81/70 and 45/12
1st number: 1 11/70, 2nd number: 3 9/12
81/70 + 45/12 is 687/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 12 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 70 × 6 = 420,
81/70 = 81 × 6/70 × 6 = 486/420 - Likewise, for the 2nd fraction, since 12 × 35 = 420,
45/12 = 45 × 35/12 × 35 = 1575/420 - Add the two like fractions:
486/420 + 1575/420 = 486 + 1575/420 = 2061/420 - 2061/420 simplified gives 687/140
- So, 81/70 + 45/12 = 687/140
In mixed form: 4127/140
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