Add 81/10 and 20/45
1st number: 8 1/10, 2nd number: 20/45
81/10 + 20/45 is 769/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 45 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 10 × 9 = 90,
81/10 = 81 × 9/10 × 9 = 729/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
20/45 = 20 × 2/45 × 2 = 40/90 - Add the two like fractions:
729/90 + 40/90 = 729 + 40/90 = 769/90 - So, 81/10 + 20/45 = 769/90
In mixed form: 849/90
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