Subtract 54/21 from 21/9
1st number: 2 3/9, 2nd number: 2 12/21
21/9 - 54/21 is -5/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 21 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 9 × 7 = 63,
21/9 = 21 × 7/9 × 7 = 147/63 - Likewise, for the 2nd fraction, since 21 × 3 = 63,
54/21 = 54 × 3/21 × 3 = 162/63 - Subtract the two like fractions:
147/63 - 162/63 = 147 - 162/63 = -15/63 - After reducing the fraction, the answer is -5/21
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