Evaluate
\frac{13}{2}=6.5
Factor
\frac{13}{2} = 6\frac{1}{2} = 6.5
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\frac{\frac{5}{20}+\frac{8}{20}}{\frac{3}{5}-\frac{1}{2}}
Least common multiple of 4 and 5 is 20. Convert \frac{1}{4} and \frac{2}{5} to fractions with denominator 20.
\frac{\frac{5+8}{20}}{\frac{3}{5}-\frac{1}{2}}
Since \frac{5}{20} and \frac{8}{20} have the same denominator, add them by adding their numerators.
\frac{\frac{13}{20}}{\frac{3}{5}-\frac{1}{2}}
Add 5 and 8 to get 13.
\frac{\frac{13}{20}}{\frac{6}{10}-\frac{5}{10}}
Least common multiple of 5 and 2 is 10. Convert \frac{3}{5} and \frac{1}{2} to fractions with denominator 10.
\frac{\frac{13}{20}}{\frac{6-5}{10}}
Since \frac{6}{10} and \frac{5}{10} have the same denominator, subtract them by subtracting their numerators.
\frac{\frac{13}{20}}{\frac{1}{10}}
Subtract 5 from 6 to get 1.
\frac{13}{20}\times 10
Divide \frac{13}{20} by \frac{1}{10} by multiplying \frac{13}{20} by the reciprocal of \frac{1}{10}.
\frac{13\times 10}{20}
Express \frac{13}{20}\times 10 as a single fraction.
\frac{130}{20}
Multiply 13 and 10 to get 130.
\frac{13}{2}
Reduce the fraction \frac{130}{20} to lowest terms by extracting and canceling out 10.
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}