Subtract 80/21 from 30/9
1st number: 3 3/9, 2nd number: 3 17/21
30/9 - 80/21 is -10/21.
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,
30/9 = 30 × 7/9 × 7 = 210/63 - Likewise, for the 2nd fraction, since 21 × 3 = 63,
80/21 = 80 × 3/21 × 3 = 240/63 - Subtract the two like fractions:
210/63 - 240/63 = 210 - 240/63 = -30/63 - After reducing the fraction, the answer is -10/21
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