Add 21/84 and 80/45
1st number: 21/84, 2nd number: 1 35/45
21/84 + 80/45 is 73/36.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 45 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 84 × 15 = 1260,
21/84 = 21 × 15/84 × 15 = 315/1260 - Likewise, for the 2nd fraction, since 45 × 28 = 1260,
80/45 = 80 × 28/45 × 28 = 2240/1260 - Add the two like fractions:
315/1260 + 2240/1260 = 315 + 2240/1260 = 2555/1260 - 2555/1260 simplified gives 73/36
- So, 21/84 + 80/45 = 73/36
In mixed form: 21/36
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