Evaluate
\frac{4}{7}\approx 0.571428571
Factor
\frac{2 ^ {2}}{7} = 0.5714285714285714
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-\frac{3}{5}\times \frac{-2}{7}+\frac{2}{5}
Reduce the fraction \frac{-6}{10} to lowest terms by extracting and canceling out 2.
-\frac{3}{5}\left(-\frac{2}{7}\right)+\frac{2}{5}
Fraction \frac{-2}{7} can be rewritten as -\frac{2}{7} by extracting the negative sign.
\frac{-3\left(-2\right)}{5\times 7}+\frac{2}{5}
Multiply -\frac{3}{5} times -\frac{2}{7} by multiplying numerator times numerator and denominator times denominator.
\frac{6}{35}+\frac{2}{5}
Do the multiplications in the fraction \frac{-3\left(-2\right)}{5\times 7}.
\frac{6}{35}+\frac{14}{35}
Least common multiple of 35 and 5 is 35. Convert \frac{6}{35} and \frac{2}{5} to fractions with denominator 35.
\frac{6+14}{35}
Since \frac{6}{35} and \frac{14}{35} have the same denominator, add them by adding their numerators.
\frac{20}{35}
Add 6 and 14 to get 20.
\frac{4}{7}
Reduce the fraction \frac{20}{35} to lowest terms by extracting and canceling out 5.
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}