Add 21/80 and 56/45
1st number: 21/80, 2nd number: 1 11/45
21/80 + 56/45 is 217/144.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 45 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 45 × 16 = 720,
56/45 = 56 × 16/45 × 16 = 896/720 - Add the two like fractions:
189/720 + 896/720 = 189 + 896/720 = 1085/720 - 1085/720 simplified gives 217/144
- So, 21/80 + 56/45 = 217/144
In mixed form: 173/144
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