Add 12/42 and 63/20
1st number: 12/42, 2nd number: 3 3/20
12/42 + 63/20 is 481/140.
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,
63/20 = 63 × 21/20 × 21 = 1323/420 - Add the two like fractions:
120/420 + 1323/420 = 120 + 1323/420 = 1443/420 - 1443/420 simplified gives 481/140
- So, 12/42 + 63/20 = 481/140
In mixed form: 361/140
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