Add 21/80 and 81/50
1st number: 21/80, 2nd number: 1 31/50
21/80 + 81/50 is 753/400.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 50 is 400
Next, find the equivalent fraction of both fractional numbers with denominator 400 - For the 1st fraction, since 80 × 5 = 400,
21/80 = 21 × 5/80 × 5 = 105/400 - Likewise, for the 2nd fraction, since 50 × 8 = 400,
81/50 = 81 × 8/50 × 8 = 648/400 - Add the two like fractions:
105/400 + 648/400 = 105 + 648/400 = 753/400 - So, 21/80 + 81/50 = 753/400
In mixed form: 1353/400
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