Subtract 72/7 from 30/9
1st number: 3 3/9, 2nd number: 10 2/7
30/9 - 72/7 is -146/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 7 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 9 × 7 = 63,
30/9 = 30 × 7/9 × 7 = 210/63 - Likewise, for the 2nd fraction, since 7 × 9 = 63,
72/7 = 72 × 9/7 × 9 = 648/63 - Subtract the two like fractions:
210/63 - 648/63 = 210 - 648/63 = -438/63 - After reducing the fraction, the answer is -146/21
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