Subtract 21/18 from 12/25
1st number: 12/25, 2nd number: 1 3/18
12/25 - 21/18 is -103/150.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 18 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 25 × 18 = 450,
12/25 = 12 × 18/25 × 18 = 216/450 - Likewise, for the 2nd fraction, since 18 × 25 = 450,
21/18 = 21 × 25/18 × 25 = 525/450 - Subtract the two like fractions:
216/450 - 525/450 = 216 - 525/450 = -309/450 - After reducing the fraction, the answer is -103/150
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