Add 21/36 and 40/54
21/36 + 40/54 is 143/108.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 54 is 108
Next, find the equivalent fraction of both fractional numbers with denominator 108 - For the 1st fraction, since 36 × 3 = 108,
21/36 = 21 × 3/36 × 3 = 63/108 - Likewise, for the 2nd fraction, since 54 × 2 = 108,
40/54 = 40 × 2/54 × 2 = 80/108 - Add the two like fractions:
63/108 + 80/108 = 63 + 80/108 = 143/108 - So, 21/36 + 40/54 = 143/108
In mixed form: 135/108
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