Subtract 42/10 from 18/45
1st number: 18/45, 2nd number: 4 2/10
18/45 - 42/10 is -19/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 10 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 45 × 2 = 90,
18/45 = 18 × 2/45 × 2 = 36/90 - Likewise, for the 2nd fraction, since 10 × 9 = 90,
42/10 = 42 × 9/10 × 9 = 378/90 - Subtract the two like fractions:
36/90 - 378/90 = 36 - 378/90 = -342/90 - After reducing the fraction, the answer is -19/5
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