Subtract 9/8 from 18/30
1st number: 18/30, 2nd number: 1 1/8
18/30 - 9/8 is -21/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 8 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 30 × 4 = 120,
18/30 = 18 × 4/30 × 4 = 72/120 - Likewise, for the 2nd fraction, since 8 × 15 = 120,
9/8 = 9 × 15/8 × 15 = 135/120 - Subtract the two like fractions:
72/120 - 135/120 = 72 - 135/120 = -63/120 - After reducing the fraction, the answer is -21/40
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