Subtract 30/70 from 8/28
8/28 - 30/70 is -1/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 70 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 28 × 5 = 140,
8/28 = 8 × 5/28 × 5 = 40/140 - Likewise, for the 2nd fraction, since 70 × 2 = 140,
30/70 = 30 × 2/70 × 2 = 60/140 - Subtract the two like fractions:
40/140 - 60/140 = 40 - 60/140 = -20/140 - After reducing the fraction, the answer is -1/7
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