Add 1/42 and 90/20
1st number: 1/42, 2nd number: 4 10/20
1/42 + 90/20 is 95/21.
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,
1/42 = 1 × 10/42 × 10 = 10/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
90/20 = 90 × 21/20 × 21 = 1890/420 - Add the two like fractions:
10/420 + 1890/420 = 10 + 1890/420 = 1900/420 - 1900/420 simplified gives 95/21
- So, 1/42 + 90/20 = 95/21
In mixed form: 411/21
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