Add 20/21 and 90/60
1st number: 20/21, 2nd number: 1 30/60
20/21 + 90/60 is 103/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 60 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 21 × 20 = 420,
20/21 = 20 × 20/21 × 20 = 400/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
90/60 = 90 × 7/60 × 7 = 630/420 - Add the two like fractions:
400/420 + 630/420 = 400 + 630/420 = 1030/420 - 1030/420 simplified gives 103/42
- So, 20/21 + 90/60 = 103/42
In mixed form: 219/42
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