Add 21/80 and 30/36
21/80 + 30/36 is 263/240.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 36 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
21/80 = 21 × 9/80 × 9 = 189/720 - Likewise, for the 2nd fraction, since 36 × 20 = 720,
30/36 = 30 × 20/36 × 20 = 600/720 - Add the two like fractions:
189/720 + 600/720 = 189 + 600/720 = 789/720 - 789/720 simplified gives 263/240
- So, 21/80 + 30/36 = 263/240
In mixed form: 123/240
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