Add 5/42 and 72/20
1st number: 5/42, 2nd number: 3 12/20
5/42 + 72/20 is 781/210.
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,
5/42 = 5 × 10/42 × 10 = 50/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
72/20 = 72 × 21/20 × 21 = 1512/420 - Add the two like fractions:
50/420 + 1512/420 = 50 + 1512/420 = 1562/420 - 1562/420 simplified gives 781/210
- So, 5/42 + 72/20 = 781/210
In mixed form: 3151/210
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