Add 81/20 and 40/45
1st number: 4 1/20, 2nd number: 40/45
81/20 + 40/45 is 889/180.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 45 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
81/20 = 81 × 9/20 × 9 = 729/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
40/45 = 40 × 4/45 × 4 = 160/180 - Add the two like fractions:
729/180 + 160/180 = 729 + 160/180 = 889/180 - So, 81/20 + 40/45 = 889/180
In mixed form: 4169/180
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