Add 21/36 and 3/45
21/36 + 3/45 is 13/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 45 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 36 × 5 = 180,
21/36 = 21 × 5/36 × 5 = 105/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
3/45 = 3 × 4/45 × 4 = 12/180 - Add the two like fractions:
105/180 + 12/180 = 105 + 12/180 = 117/180 - 117/180 simplified gives 13/20
- So, 21/36 + 3/45 = 13/20
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