Subtract 1/18 from 42/30
1st number: 1 12/30, 2nd number: 1/18
42/30 - 1/18 is 121/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 30 × 3 = 90,
42/30 = 42 × 3/30 × 3 = 126/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
1/18 = 1 × 5/18 × 5 = 5/90 - Subtract the two like fractions:
126/90 - 5/90 = 126 - 5/90 = 121/90 - In mixed form: 131/90
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