Subtract 45/81 from 21/4
1st number: 5 1/4, 2nd number: 45/81
21/4 - 45/81 is 169/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 81 is 324
Next, find the equivalent fraction of both fractional numbers with denominator 324 - For the 1st fraction, since 4 × 81 = 324,
21/4 = 21 × 81/4 × 81 = 1701/324 - Likewise, for the 2nd fraction, since 81 × 4 = 324,
45/81 = 45 × 4/81 × 4 = 180/324 - Subtract the two like fractions:
1701/324 - 180/324 = 1701 - 180/324 = 1521/324 - After reducing the fraction, the answer is 169/36
- In mixed form: 425/36
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