Subtract 90/21 from 45/3
1st number: 15 0/3, 2nd number: 4 6/21
45/3 - 90/21 is 75/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 21 is 21
Next, find the equivalent fraction of both fractional numbers with denominator 21 - For the 1st fraction, since 3 × 7 = 21,
45/3 = 45 × 7/3 × 7 = 315/21 - Likewise, for the 2nd fraction, since 21 × 1 = 21,
90/21 = 90 × 1/21 × 1 = 90/21 - Subtract the two like fractions:
315/21 - 90/21 = 315 - 90/21 = 225/21 - After reducing the fraction, the answer is 75/7
- In mixed form: 105/7
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