Subtract 30/9 from 90/7
1st number: 12 6/7, 2nd number: 3 3/9
90/7 - 30/9 is 200/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 9 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 7 × 9 = 63,
90/7 = 90 × 9/7 × 9 = 810/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
30/9 = 30 × 7/9 × 7 = 210/63 - Subtract the two like fractions:
810/63 - 210/63 = 810 - 210/63 = 600/63 - After reducing the fraction, the answer is 200/21
- In mixed form: 911/21
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