Add 12/40 and 81/30
1st number: 12/40, 2nd number: 2 21/30
12/40 + 81/30 is 3/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 30 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 40 × 3 = 120,
12/40 = 12 × 3/40 × 3 = 36/120 - Likewise, for the 2nd fraction, since 30 × 4 = 120,
81/30 = 81 × 4/30 × 4 = 324/120 - Add the two like fractions:
36/120 + 324/120 = 36 + 324/120 = 360/120 - 360/120 simplified gives 3/1
- So, 12/40 + 81/30 = 3/1
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