Add 25/54 and 12/21
25/54 + 12/21 is 391/378.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 21 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 54 × 7 = 378,
25/54 = 25 × 7/54 × 7 = 175/378 - Likewise, for the 2nd fraction, since 21 × 18 = 378,
12/21 = 12 × 18/21 × 18 = 216/378 - Add the two like fractions:
175/378 + 216/378 = 175 + 216/378 = 391/378 - So, 25/54 + 12/21 = 391/378
In mixed form: 113/378
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