Add 12/40 and 36/42
12/40 + 36/42 is 81/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 42 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 40 × 21 = 840,
12/40 = 12 × 21/40 × 21 = 252/840 - Likewise, for the 2nd fraction, since 42 × 20 = 840,
36/42 = 36 × 20/42 × 20 = 720/840 - Add the two like fractions:
252/840 + 720/840 = 252 + 720/840 = 972/840 - 972/840 simplified gives 81/70
- So, 12/40 + 36/42 = 81/70
In mixed form: 111/70
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