Evaluate
\frac{25}{161}\approx 0.155279503
Factor
\frac{5 ^ {2}}{7 \cdot 23} = 0.15527950310559005
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\frac{140}{161}-\frac{115}{161}
Least common multiple of 23 and 7 is 161. Convert \frac{20}{23} and \frac{5}{7} to fractions with denominator 161.
\frac{140-115}{161}
Since \frac{140}{161} and \frac{115}{161} have the same denominator, subtract them by subtracting their numerators.
\frac{25}{161}
Subtract 115 from 140 to get 25.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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y = 3x + 4
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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}