Subtract 42/12 from 40/45
1st number: 40/45, 2nd number: 3 6/12
40/45 - 42/12 is -47/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 12 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,
40/45 = 40 × 4/45 × 4 = 160/180 - Likewise, for the 2nd fraction, since 12 × 15 = 180,
42/12 = 42 × 15/12 × 15 = 630/180 - Subtract the two like fractions:
160/180 - 630/180 = 160 - 630/180 = -470/180 - After reducing the fraction, the answer is -47/18
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