Subtract 8/30 from 7/70
7/70 - 8/30 is -1/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 70 × 3 = 210,
7/70 = 7 × 3/70 × 3 = 21/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
8/30 = 8 × 7/30 × 7 = 56/210 - Subtract the two like fractions:
21/210 - 56/210 = 21 - 56/210 = -35/210 - After reducing the fraction, the answer is -1/6
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