Subtract 45/50 from 18/21
18/21 - 45/50 is -3/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 50 is 1050
Next, find the equivalent fraction of both fractional numbers with denominator 1050 - For the 1st fraction, since 21 × 50 = 1050,
18/21 = 18 × 50/21 × 50 = 900/1050 - Likewise, for the 2nd fraction, since 50 × 21 = 1050,
45/50 = 45 × 21/50 × 21 = 945/1050 - Subtract the two like fractions:
900/1050 - 945/1050 = 900 - 945/1050 = -45/1050 - After reducing the fraction, the answer is -3/70
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