Add 21/45 and 28/36
21/45 + 28/36 is 56/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 36 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,
21/45 = 21 × 4/45 × 4 = 84/180 - Likewise, for the 2nd fraction, since 36 × 5 = 180,
28/36 = 28 × 5/36 × 5 = 140/180 - Add the two like fractions:
84/180 + 140/180 = 84 + 140/180 = 224/180 - 224/180 simplified gives 56/45
- So, 21/45 + 28/36 = 56/45
In mixed form: 111/45
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