Add 18/42 and 45/20
1st number: 18/42, 2nd number: 2 5/20
18/42 + 45/20 is 75/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 42 × 10 = 420,
18/42 = 18 × 10/42 × 10 = 180/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
45/20 = 45 × 21/20 × 21 = 945/420 - Add the two like fractions:
180/420 + 945/420 = 180 + 945/420 = 1125/420 - 1125/420 simplified gives 75/28
- So, 18/42 + 45/20 = 75/28
In mixed form: 219/28
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