Add 21/60 and 81/45
1st number: 21/60, 2nd number: 1 36/45
21/60 + 81/45 is 43/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 45 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 60 × 3 = 180,
21/60 = 21 × 3/60 × 3 = 63/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
81/45 = 81 × 4/45 × 4 = 324/180 - Add the two like fractions:
63/180 + 324/180 = 63 + 324/180 = 387/180 - 387/180 simplified gives 43/20
- So, 21/60 + 81/45 = 43/20
In mixed form: 23/20
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