Add 21/2 and 80/90
1st number: 10 1/2, 2nd number: 80/90
21/2 + 80/90 is 205/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 2 × 45 = 90,
21/2 = 21 × 45/2 × 45 = 945/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
80/90 = 80 × 1/90 × 1 = 80/90 - Add the two like fractions:
945/90 + 80/90 = 945 + 80/90 = 1025/90 - 1025/90 simplified gives 205/18
- So, 21/2 + 80/90 = 205/18
In mixed form: 117/18
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