Evaluate
-\frac{4}{5}=-0.8
Factor
-\frac{4}{5} = -0.8
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\frac{\frac{6}{3}+\frac{2}{3}-4}{1+\frac{2}{3}}
Convert 2 to fraction \frac{6}{3}.
\frac{\frac{6+2}{3}-4}{1+\frac{2}{3}}
Since \frac{6}{3} and \frac{2}{3} have the same denominator, add them by adding their numerators.
\frac{\frac{8}{3}-4}{1+\frac{2}{3}}
Add 6 and 2 to get 8.
\frac{\frac{8}{3}-\frac{12}{3}}{1+\frac{2}{3}}
Convert 4 to fraction \frac{12}{3}.
\frac{\frac{8-12}{3}}{1+\frac{2}{3}}
Since \frac{8}{3} and \frac{12}{3} have the same denominator, subtract them by subtracting their numerators.
\frac{-\frac{4}{3}}{1+\frac{2}{3}}
Subtract 12 from 8 to get -4.
\frac{-\frac{4}{3}}{\frac{3}{3}+\frac{2}{3}}
Convert 1 to fraction \frac{3}{3}.
\frac{-\frac{4}{3}}{\frac{3+2}{3}}
Since \frac{3}{3} and \frac{2}{3} have the same denominator, add them by adding their numerators.
\frac{-\frac{4}{3}}{\frac{5}{3}}
Add 3 and 2 to get 5.
-\frac{4}{3}\times \frac{3}{5}
Divide -\frac{4}{3} by \frac{5}{3} by multiplying -\frac{4}{3} by the reciprocal of \frac{5}{3}.
\frac{-4\times 3}{3\times 5}
Multiply -\frac{4}{3} times \frac{3}{5} by multiplying numerator times numerator and denominator times denominator.
\frac{-4}{5}
Cancel out 3 in both numerator and denominator.
-\frac{4}{5}
Fraction \frac{-4}{5} can be rewritten as -\frac{4}{5} by extracting the negative sign.
Examples
Quadratic equation
{ x } ^ { 2 } - 4 x - 5 = 0
Trigonometry
4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
y = 3x + 4
Arithmetic
699 * 533
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
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}