Add 42/20 and 63/45
1st number: 2 2/20, 2nd number: 1 18/45
42/20 + 63/45 is 7/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 45 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
42/20 = 42 × 9/20 × 9 = 378/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
63/45 = 63 × 4/45 × 4 = 252/180 - Add the two like fractions:
378/180 + 252/180 = 378 + 252/180 = 630/180 - 630/180 simplified gives 7/2
- So, 42/20 + 63/45 = 7/2
In mixed form: 31/2
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