Subtract 16/70 from 18/90
18/90 - 16/70 is -1/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
18/90 = 18 × 7/90 × 7 = 126/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
16/70 = 16 × 9/70 × 9 = 144/630 - Subtract the two like fractions:
126/630 - 144/630 = 126 - 144/630 = -18/630 - After reducing the fraction, the answer is -1/35
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