Subtract 21/50 from 12/36
12/36 - 21/50 is -13/150.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 50 is 900
Next, find the equivalent fraction of both fractional numbers with denominator 900 - For the 1st fraction, since 36 × 25 = 900,
12/36 = 12 × 25/36 × 25 = 300/900 - Likewise, for the 2nd fraction, since 50 × 18 = 900,
21/50 = 21 × 18/50 × 18 = 378/900 - Subtract the two like fractions:
300/900 - 378/900 = 300 - 378/900 = -78/900 - After reducing the fraction, the answer is -13/150
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