Add 12/42 and 9/20
12/42 + 9/20 is 103/140.
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,
9/20 = 9 × 21/20 × 21 = 189/420 - Add the two like fractions:
120/420 + 189/420 = 120 + 189/420 = 309/420 - 309/420 simplified gives 103/140
- So, 12/42 + 9/20 = 103/140
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