Add 72/42 and 12/40
1st number: 1 30/42, 2nd number: 12/40
72/42 + 12/40 is 141/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 42 × 20 = 840,
72/42 = 72 × 20/42 × 20 = 1440/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
12/40 = 12 × 21/40 × 21 = 252/840 - Add the two like fractions:
1440/840 + 252/840 = 1440 + 252/840 = 1692/840 - 1692/840 simplified gives 141/70
- So, 72/42 + 12/40 = 141/70
In mixed form: 21/70
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