Add 12/45 and 42/20
1st number: 12/45, 2nd number: 2 2/20
12/45 + 42/20 is 71/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,
12/45 = 12 × 4/45 × 4 = 48/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
42/20 = 42 × 9/20 × 9 = 378/180 - Add the two like fractions:
48/180 + 378/180 = 48 + 378/180 = 426/180 - 426/180 simplified gives 71/30
- So, 12/45 + 42/20 = 71/30
In mixed form: 211/30
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