Subtract 45/84 from 63/21
1st number: 3 0/21, 2nd number: 45/84
63/21 - 45/84 is 69/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 84 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
63/21 = 63 × 4/21 × 4 = 252/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
45/84 = 45 × 1/84 × 1 = 45/84 - Subtract the two like fractions:
252/84 - 45/84 = 252 - 45/84 = 207/84 - After reducing the fraction, the answer is 69/28
- In mixed form: 213/28
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