Evaluate
-\frac{17}{40}=-0.425
Factor
-\frac{17}{40} = -0.425
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\frac{15}{40}-\frac{32}{40}
Least common multiple of 8 and 5 is 40. Convert \frac{3}{8} and \frac{4}{5} to fractions with denominator 40.
\frac{15-32}{40}
Since \frac{15}{40} and \frac{32}{40} have the same denominator, subtract them by subtracting their numerators.
-\frac{17}{40}
Subtract 32 from 15 to get -17.
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
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Limits
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