Add 21/20 and 12/42
1st number: 1 1/20, 2nd number: 12/42
21/20 + 12/42 is 187/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 42 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
21/20 = 21 × 21/20 × 21 = 441/420 - Likewise, for the 2nd fraction, since 42 × 10 = 420,
12/42 = 12 × 10/42 × 10 = 120/420 - Add the two like fractions:
441/420 + 120/420 = 441 + 120/420 = 561/420 - 561/420 simplified gives 187/140
- So, 21/20 + 12/42 = 187/140
In mixed form: 147/140
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