Subtract 81/18 from 12/70
1st number: 12/70, 2nd number: 4 9/18
12/70 - 81/18 is -303/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 18 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 70 × 9 = 630,
12/70 = 12 × 9/70 × 9 = 108/630 - Likewise, for the 2nd fraction, since 18 × 35 = 630,
81/18 = 81 × 35/18 × 35 = 2835/630 - Subtract the two like fractions:
108/630 - 2835/630 = 108 - 2835/630 = -2727/630 - After reducing the fraction, the answer is -303/70
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