Subtract 3/30 from 81/21
1st number: 3 18/21, 2nd number: 3/30
81/21 - 3/30 is 263/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
81/21 = 81 × 10/21 × 10 = 810/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
3/30 = 3 × 7/30 × 7 = 21/210 - Subtract the two like fractions:
810/210 - 21/210 = 810 - 21/210 = 789/210 - After reducing the fraction, the answer is 263/70
- In mixed form: 353/70
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