Evaluate
\frac{21}{8}=2.625
Factor
\frac{3 \cdot 7}{2 ^ {3}} = 2\frac{5}{8} = 2.625
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\frac{15+2}{5}\times \frac{7}{34}\times \frac{3\times 4+3}{4}
Multiply 3 and 5 to get 15.
\frac{17}{5}\times \frac{7}{34}\times \frac{3\times 4+3}{4}
Add 15 and 2 to get 17.
\frac{17\times 7}{5\times 34}\times \frac{3\times 4+3}{4}
Multiply \frac{17}{5} times \frac{7}{34} by multiplying numerator times numerator and denominator times denominator.
\frac{119}{170}\times \frac{3\times 4+3}{4}
Do the multiplications in the fraction \frac{17\times 7}{5\times 34}.
\frac{7}{10}\times \frac{3\times 4+3}{4}
Reduce the fraction \frac{119}{170} to lowest terms by extracting and canceling out 17.
\frac{7}{10}\times \frac{12+3}{4}
Multiply 3 and 4 to get 12.
\frac{7}{10}\times \frac{15}{4}
Add 12 and 3 to get 15.
\frac{7\times 15}{10\times 4}
Multiply \frac{7}{10} times \frac{15}{4} by multiplying numerator times numerator and denominator times denominator.
\frac{105}{40}
Do the multiplications in the fraction \frac{7\times 15}{10\times 4}.
\frac{21}{8}
Reduce the fraction \frac{105}{40} to lowest terms by extracting and canceling out 5.
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}