Add 45/21 and 80/60
1st number: 2 3/21, 2nd number: 1 20/60
45/21 + 80/60 is 73/21.
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,
45/21 = 45 × 20/21 × 20 = 900/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
80/60 = 80 × 7/60 × 7 = 560/420 - Add the two like fractions:
900/420 + 560/420 = 900 + 560/420 = 1460/420 - 1460/420 simplified gives 73/21
- So, 45/21 + 80/60 = 73/21
In mixed form: 310/21
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