Add 3/20 and 72/42
1st number: 3/20, 2nd number: 1 30/42
3/20 + 72/42 is 261/140.
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,
3/20 = 3 × 21/20 × 21 = 63/420 - Likewise, for the 2nd fraction, since 42 × 10 = 420,
72/42 = 72 × 10/42 × 10 = 720/420 - Add the two like fractions:
63/420 + 720/420 = 63 + 720/420 = 783/420 - 783/420 simplified gives 261/140
- So, 3/20 + 72/42 = 261/140
In mixed form: 1121/140
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