Evaluate
-\frac{19}{21}\approx -0.904761905
Factor
-\frac{19}{21} = -0.9047619047619048
Share
Copied to clipboard
\frac{3}{7}\left(-\frac{19}{9}\right)
Fraction \frac{-19}{9} can be rewritten as -\frac{19}{9} by extracting the negative sign.
\frac{3\left(-19\right)}{7\times 9}
Multiply \frac{3}{7} times -\frac{19}{9} by multiplying numerator times numerator and denominator times denominator.
\frac{-57}{63}
Do the multiplications in the fraction \frac{3\left(-19\right)}{7\times 9}.
-\frac{19}{21}
Reduce the fraction \frac{-57}{63} to lowest terms by extracting and canceling out 3.
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}