Evaluate
1.625
Factor
\frac{13}{2 ^ {3}} = 1\frac{5}{8} = 1.625
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\frac{5.2}{\frac{20}{5}-\frac{4}{5}}
Convert 4 to fraction \frac{20}{5}.
\frac{5.2}{\frac{20-4}{5}}
Since \frac{20}{5} and \frac{4}{5} have the same denominator, subtract them by subtracting their numerators.
\frac{5.2}{\frac{16}{5}}
Subtract 4 from 20 to get 16.
5.2\times \frac{5}{16}
Divide 5.2 by \frac{16}{5} by multiplying 5.2 by the reciprocal of \frac{16}{5}.
\frac{26}{5}\times \frac{5}{16}
Convert decimal number 5.2 to fraction \frac{52}{10}. Reduce the fraction \frac{52}{10} to lowest terms by extracting and canceling out 2.
\frac{26\times 5}{5\times 16}
Multiply \frac{26}{5} times \frac{5}{16} by multiplying numerator times numerator and denominator times denominator.
\frac{26}{16}
Cancel out 5 in both numerator and denominator.
\frac{13}{8}
Reduce the fraction \frac{26}{16} to lowest terms by extracting and canceling out 2.
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}