Evaluate
\frac{3}{8}=0.375
Factor
\frac{3}{2 ^ {3}} = 0.375
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\frac{\left(1\times 7+4\right)\times 21}{7\left(4\times 21+4\right)}
Divide \frac{1\times 7+4}{7} by \frac{4\times 21+4}{21} by multiplying \frac{1\times 7+4}{7} by the reciprocal of \frac{4\times 21+4}{21}.
\frac{3\left(4+7\right)}{4+4\times 21}
Cancel out 7 in both numerator and denominator.
\frac{3\times 11}{4+4\times 21}
Add 4 and 7 to get 11.
\frac{33}{4+4\times 21}
Multiply 3 and 11 to get 33.
\frac{33}{4+84}
Multiply 4 and 21 to get 84.
\frac{33}{88}
Add 4 and 84 to get 88.
\frac{3}{8}
Reduce the fraction \frac{33}{88} to lowest terms by extracting and canceling out 11.
Examples
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{ 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}