Add 12/42 and 40/20
1st number: 12/42, 2nd number: 2 0/20
12/42 + 40/20 is 16/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 42 × 10 = 420,
12/42 = 12 × 10/42 × 10 = 120/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
40/20 = 40 × 21/20 × 21 = 840/420 - Add the two like fractions:
120/420 + 840/420 = 120 + 840/420 = 960/420 - 960/420 simplified gives 16/7
- So, 12/42 + 40/20 = 16/7
In mixed form: 22/7
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