Subtract 21/56 from 5/45
5/45 - 21/56 is -19/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 56 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 45 × 56 = 2520,
5/45 = 5 × 56/45 × 56 = 280/2520 - Likewise, for the 2nd fraction, since 56 × 45 = 2520,
21/56 = 21 × 45/56 × 45 = 945/2520 - Subtract the two like fractions:
280/2520 - 945/2520 = 280 - 945/2520 = -665/2520 - After reducing the fraction, the answer is -19/72
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