Subtract 40/84 from 9/70
9/70 - 40/84 is -73/210.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 70 × 6 = 420,
9/70 = 9 × 6/70 × 6 = 54/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
40/84 = 40 × 5/84 × 5 = 200/420 - Subtract the two like fractions:
54/420 - 200/420 = 54 - 200/420 = -146/420 - After reducing the fraction, the answer is -73/210
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