Subtract 45/72 from 2/21
2/21 - 45/72 is -89/168.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 21 × 24 = 504,
2/21 = 2 × 24/21 × 24 = 48/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
45/72 = 45 × 7/72 × 7 = 315/504 - Subtract the two like fractions:
48/504 - 315/504 = 48 - 315/504 = -267/504 - After reducing the fraction, the answer is -89/168
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