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-9.91
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-9.91
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\frac{18}{200}-10
Expand \frac{1.8}{20} by multiplying both numerator and the denominator by 10.
\frac{9}{100}-10
Reduce the fraction \frac{18}{200} to lowest terms by extracting and canceling out 2.
\frac{9}{100}-\frac{1000}{100}
Convert 10 to fraction \frac{1000}{100}.
\frac{9-1000}{100}
Since \frac{9}{100} and \frac{1000}{100} have the same denominator, subtract them by subtracting their numerators.
-\frac{991}{100}
Subtract 1000 from 9 to get -991.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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y = 3x + 4
Arithmetic
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Matrix
\left[ \begin{array} { l l } { 2 } & { 3 } \\ { 5 } & { 4 } \end{array} \right] \left[ \begin{array} { l l l } { 2 } & { 0 } & { 3 } \\ { -1 } & { 1 } & { 5 } \end{array} \right]
Simultaneous equation
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
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Limits
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