Evaluate
\frac{4}{65}\approx 0.061538462
Factor
\frac{2 ^ {2}}{5 \cdot 13} = 0.06153846153846154
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\frac{1}{13}\times \frac{4}{5}
Divide \frac{1}{13} by \frac{5}{4} by multiplying \frac{1}{13} by the reciprocal of \frac{5}{4}.
\frac{1\times 4}{13\times 5}
Multiply \frac{1}{13} times \frac{4}{5} by multiplying numerator times numerator and denominator times denominator.
\frac{4}{65}
Do the multiplications in the fraction \frac{1\times 4}{13\times 5}.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
Trigonometry
4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
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
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}