Add 15/30 and 42/40
1st number: 15/30, 2nd number: 1 2/40
15/30 + 42/40 is 31/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 30 × 4 = 120,
15/30 = 15 × 4/30 × 4 = 60/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
42/40 = 42 × 3/40 × 3 = 126/120 - Add the two like fractions:
60/120 + 126/120 = 60 + 126/120 = 186/120 - 186/120 simplified gives 31/20
- So, 15/30 + 42/40 = 31/20
In mixed form: 111/20
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