Add 21/24 and 25/42
21/24 + 25/42 is 247/168.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 42 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 24 × 7 = 168,
21/24 = 21 × 7/24 × 7 = 147/168 - Likewise, for the 2nd fraction, since 42 × 4 = 168,
25/42 = 25 × 4/42 × 4 = 100/168 - Add the two like fractions:
147/168 + 100/168 = 147 + 100/168 = 247/168 - So, 21/24 + 25/42 = 247/168
In mixed form: 179/168
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