Evaluate
\frac{31}{13}\approx 2.384615385
Factor
\frac{31}{13} = 2\frac{5}{13} = 2.3846153846153846
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1+\frac{3}{\frac{12}{6}+\frac{1}{6}}
Convert 2 to fraction \frac{12}{6}.
1+\frac{3}{\frac{12+1}{6}}
Since \frac{12}{6} and \frac{1}{6} have the same denominator, add them by adding their numerators.
1+\frac{3}{\frac{13}{6}}
Add 12 and 1 to get 13.
1+3\times \frac{6}{13}
Divide 3 by \frac{13}{6} by multiplying 3 by the reciprocal of \frac{13}{6}.
1+\frac{3\times 6}{13}
Express 3\times \frac{6}{13} as a single fraction.
1+\frac{18}{13}
Multiply 3 and 6 to get 18.
\frac{13}{13}+\frac{18}{13}
Convert 1 to fraction \frac{13}{13}.
\frac{13+18}{13}
Since \frac{13}{13} and \frac{18}{13} have the same denominator, add them by adding their numerators.
\frac{31}{13}
Add 13 and 18 to get 31.
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}