Add 21/80 and 75/10
1st number: 21/80, 2nd number: 7 5/10
21/80 + 75/10 is 621/80.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 10 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 80 × 1 = 80,
21/80 = 21 × 1/80 × 1 = 21/80 - Likewise, for the 2nd fraction, since 10 × 8 = 80,
75/10 = 75 × 8/10 × 8 = 600/80 - Add the two like fractions:
21/80 + 600/80 = 21 + 600/80 = 621/80 - So, 21/80 + 75/10 = 621/80
In mixed form: 761/80
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