Subtract 8/21 from 16/72
16/72 - 8/21 is -10/63.
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,
16/72 = 16 × 7/72 × 7 = 112/504 - Likewise, for the 2nd fraction, since 21 × 24 = 504,
8/21 = 8 × 24/21 × 24 = 192/504 - Subtract the two like fractions:
112/504 - 192/504 = 112 - 192/504 = -80/504 - After reducing the fraction, the answer is -10/63
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