Add 72/40 and 84/42
1st number: 1 32/40, 2nd number: 2 0/42
72/40 + 84/42 is 19/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 42 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 40 × 21 = 840,
72/40 = 72 × 21/40 × 21 = 1512/840 - Likewise, for the 2nd fraction, since 42 × 20 = 840,
84/42 = 84 × 20/42 × 20 = 1680/840 - Add the two like fractions:
1512/840 + 1680/840 = 1512 + 1680/840 = 3192/840 - 3192/840 simplified gives 19/5
- So, 72/40 + 84/42 = 19/5
In mixed form: 34/5
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