Subtract 7/72 from 15/21
1521 - 772 is 311504.
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,
1521 = 15 × 2421 × 24 = 360504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
772 = 7 × 772 × 7 = 49504 - Subtract the two like fractions:
360504 - 49504 = 360 - 49504 = 311504
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