Evaluate
\frac{40}{21}\approx 1.904761905
Factor
\frac{2 ^ {3} \cdot 5}{3 \cdot 7} = 1\frac{19}{21} = 1.9047619047619047
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\frac{5}{3}\times \frac{8}{7}
Divide \frac{5}{3} by \frac{7}{8} by multiplying \frac{5}{3} by the reciprocal of \frac{7}{8}.
\frac{5\times 8}{3\times 7}
Multiply \frac{5}{3} times \frac{8}{7} by multiplying numerator times numerator and denominator times denominator.
\frac{40}{21}
Do the multiplications in the fraction \frac{5\times 8}{3\times 7}.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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4 \sin \theta \cos \theta = 2 \sin \theta
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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}