Add 80/21 and 81/60
1st number: 3 17/21, 2nd number: 1 21/60
80/21 + 81/60 is 2167/420.
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,
80/21 = 80 × 20/21 × 20 = 1600/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
81/60 = 81 × 7/60 × 7 = 567/420 - Add the two like fractions:
1600/420 + 567/420 = 1600 + 567/420 = 2167/420 - So, 80/21 + 81/60 = 2167/420
In mixed form: 567/420
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