Subtract 9/28 from 30/72
30/72 - 9/28 is 2/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 28 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 28 × 18 = 504,
9/28 = 9 × 18/28 × 18 = 162/504 - Subtract the two like fractions:
210/504 - 162/504 = 210 - 162/504 = 48/504 - After reducing the fraction, the answer is 2/21
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