Add 80/4 and 45/21
1st number: 20 0/4, 2nd number: 2 3/21
80/4 + 45/21 is 155/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 4 × 21 = 84,
80/4 = 80 × 21/4 × 21 = 1680/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
45/21 = 45 × 4/21 × 4 = 180/84 - Add the two like fractions:
1680/84 + 180/84 = 1680 + 180/84 = 1860/84 - 1860/84 simplified gives 155/7
- So, 80/4 + 45/21 = 155/7
In mixed form: 221/7
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