Subtract 9/21 from 7/72
772 - 921 is -167504.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 21 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 72 × 7 = 504,
772 = 7 × 772 × 7 = 49504 - Likewise, for the 2nd fraction, since 21 × 24 = 504,
921 = 9 × 2421 × 24 = 216504 - Subtract the two like fractions:
49504 - 216504 = 49 - 216504 = -167504
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