Solve for n
n=-0.1979
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n+\frac{1}{5}=0.0021
Swap sides so that all variable terms are on the left hand side.
n=0.0021-\frac{1}{5}
Subtract \frac{1}{5} from both sides.
n=\frac{21}{10000}-\frac{1}{5}
Convert decimal number 0.0021 to fraction \frac{21}{10000}.
n=\frac{21}{10000}-\frac{2000}{10000}
Least common multiple of 10000 and 5 is 10000. Convert \frac{21}{10000} and \frac{1}{5} to fractions with denominator 10000.
n=\frac{21-2000}{10000}
Since \frac{21}{10000} and \frac{2000}{10000} have the same denominator, subtract them by subtracting their numerators.
n=-\frac{1979}{10000}
Subtract 2000 from 21 to get -1979.
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