( 1 - 15 \% ) \times 3
Evaluate
\frac{51}{20}=2.55
Factor
\frac{3 \cdot 17}{2 ^ {2} \cdot 5} = 2\frac{11}{20} = 2.55
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\left(1-\frac{3}{20}\right)\times 3
Reduce the fraction \frac{15}{100} to lowest terms by extracting and canceling out 5.
\left(\frac{20}{20}-\frac{3}{20}\right)\times 3
Convert 1 to fraction \frac{20}{20}.
\frac{20-3}{20}\times 3
Since \frac{20}{20} and \frac{3}{20} have the same denominator, subtract them by subtracting their numerators.
\frac{17}{20}\times 3
Subtract 3 from 20 to get 17.
\frac{17\times 3}{20}
Express \frac{17}{20}\times 3 as a single fraction.
\frac{51}{20}
Multiply 17 and 3 to get 51.
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}