42 \% \text { of } 20
Evaluate
\frac{42}{5}=8.4
Factor
\frac{2 \cdot 3 \cdot 7}{5} = 8\frac{2}{5} = 8.4
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\frac{21}{50}\times 20
Reduce the fraction \frac{42}{100} to lowest terms by extracting and canceling out 2.
\frac{21\times 20}{50}
Express \frac{21}{50}\times 20 as a single fraction.
\frac{420}{50}
Multiply 21 and 20 to get 420.
\frac{42}{5}
Reduce the fraction \frac{420}{50} to lowest terms by extracting and canceling out 10.
Examples
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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]
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\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
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\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
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