Add 21/80 and 84/28
1st number: 21/80, 2nd number: 3 0/28
21/80 + 84/28 is 261/80.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 28 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 80 × 7 = 560,
21/80 = 21 × 7/80 × 7 = 147/560 - Likewise, for the 2nd fraction, since 28 × 20 = 560,
84/28 = 84 × 20/28 × 20 = 1680/560 - Add the two like fractions:
147/560 + 1680/560 = 147 + 1680/560 = 1827/560 - 1827/560 simplified gives 261/80
- So, 21/80 + 84/28 = 261/80
In mixed form: 321/80
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