Add 81/8 and 45/20
1st number: 10 1/8, 2nd number: 2 5/20
81/8 + 45/20 is 99/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 20 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 8 × 5 = 40,
81/8 = 81 × 5/8 × 5 = 405/40 - Likewise, for the 2nd fraction, since 20 × 2 = 40,
45/20 = 45 × 2/20 × 2 = 90/40 - Add the two like fractions:
405/40 + 90/40 = 405 + 90/40 = 495/40 - 495/40 simplified gives 99/8
- So, 81/8 + 45/20 = 99/8
In mixed form: 123/8
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