Subtract 3/7 from 30/72
30/72 - 3/7 is -1/84.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 7 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 72 × 7 = 504,
30/72 = 30 × 7/72 × 7 = 210/504 - Likewise, for the 2nd fraction, since 7 × 72 = 504,
3/7 = 3 × 72/7 × 72 = 216/504 - Subtract the two like fractions:
210/504 - 216/504 = 210 - 216/504 = -6/504 - After reducing the fraction, the answer is -1/84
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