Add 21/2 and 90/80
1st number: 10 1/2, 2nd number: 1 10/80
21/2 + 90/80 is 93/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 2 × 40 = 80,
21/2 = 21 × 40/2 × 40 = 840/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
90/80 = 90 × 1/80 × 1 = 90/80 - Add the two like fractions:
840/80 + 90/80 = 840 + 90/80 = 930/80 - 930/80 simplified gives 93/8
- So, 21/2 + 90/80 = 93/8
In mixed form: 115/8
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