Add 21/36 and 4/8
21/36 + 4/8 is 13/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 8 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 36 × 2 = 72,
21/36 = 21 × 2/36 × 2 = 42/72 - Likewise, for the 2nd fraction, since 8 × 9 = 72,
4/8 = 4 × 9/8 × 9 = 36/72 - Add the two like fractions:
42/72 + 36/72 = 42 + 36/72 = 78/72 - 78/72 simplified gives 13/12
- So, 21/36 + 4/8 = 13/12
In mixed form: 11/12
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