Subtract 70/40 from 30/18
1st number: 1 12/18, 2nd number: 1 30/40
30/18 - 70/40 is -1/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 18 × 20 = 360,
30/18 = 30 × 20/18 × 20 = 600/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
70/40 = 70 × 9/40 × 9 = 630/360 - Subtract the two like fractions:
600/360 - 630/360 = 600 - 630/360 = -30/360 - After reducing the fraction, the answer is -1/12
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