Subtract 45/30 from 90/7
1st number: 12 6/7, 2nd number: 1 15/30
90/7 - 45/30 is 159/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 7 × 30 = 210,
90/7 = 90 × 30/7 × 30 = 2700/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
45/30 = 45 × 7/30 × 7 = 315/210 - Subtract the two like fractions:
2700/210 - 315/210 = 2700 - 315/210 = 2385/210 - After reducing the fraction, the answer is 159/14
- In mixed form: 115/14
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