Add 21/16 and 80/45
1st number: 1 5/16, 2nd number: 1 35/45
21/16 + 80/45 is 445/144.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 45 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 16 × 45 = 720,
21/16 = 21 × 45/16 × 45 = 945/720 - Likewise, for the 2nd fraction, since 45 × 16 = 720,
80/45 = 80 × 16/45 × 16 = 1280/720 - Add the two like fractions:
945/720 + 1280/720 = 945 + 1280/720 = 2225/720 - 2225/720 simplified gives 445/144
- So, 21/16 + 80/45 = 445/144
In mixed form: 313/144
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