Add 12/80 and 81/30
1st number: 12/80, 2nd number: 2 21/30
12/80 + 81/30 is 57/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 30 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 80 × 3 = 240,
12/80 = 12 × 3/80 × 3 = 36/240 - Likewise, for the 2nd fraction, since 30 × 8 = 240,
81/30 = 81 × 8/30 × 8 = 648/240 - Add the two like fractions:
36/240 + 648/240 = 36 + 648/240 = 684/240 - 684/240 simplified gives 57/20
- So, 12/80 + 81/30 = 57/20
In mixed form: 217/20
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