Add 1/21 and 18/36
1/21 + 18/36 is 23/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 36 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 21 × 12 = 252,
1/21 = 1 × 12/21 × 12 = 12/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
18/36 = 18 × 7/36 × 7 = 126/252 - Add the two like fractions:
12/252 + 126/252 = 12 + 126/252 = 138/252 - 138/252 simplified gives 23/42
- So, 1/21 + 18/36 = 23/42
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