Evaluate
\frac{21}{25}=0.84
Factor
\frac{3 \cdot 7}{5 ^ {2}} = 0.84
Share
Copied to clipboard
\frac{\frac{6+1}{2}}{\frac{1\times 15+4}{15}+\frac{2\times 10+9}{10}}
Multiply 3 and 2 to get 6.
\frac{\frac{7}{2}}{\frac{1\times 15+4}{15}+\frac{2\times 10+9}{10}}
Add 6 and 1 to get 7.
\frac{\frac{7}{2}}{\frac{15+4}{15}+\frac{2\times 10+9}{10}}
Multiply 1 and 15 to get 15.
\frac{\frac{7}{2}}{\frac{19}{15}+\frac{2\times 10+9}{10}}
Add 15 and 4 to get 19.
\frac{\frac{7}{2}}{\frac{19}{15}+\frac{20+9}{10}}
Multiply 2 and 10 to get 20.
\frac{\frac{7}{2}}{\frac{19}{15}+\frac{29}{10}}
Add 20 and 9 to get 29.
\frac{\frac{7}{2}}{\frac{38}{30}+\frac{87}{30}}
Least common multiple of 15 and 10 is 30. Convert \frac{19}{15} and \frac{29}{10} to fractions with denominator 30.
\frac{\frac{7}{2}}{\frac{38+87}{30}}
Since \frac{38}{30} and \frac{87}{30} have the same denominator, add them by adding their numerators.
\frac{\frac{7}{2}}{\frac{125}{30}}
Add 38 and 87 to get 125.
\frac{\frac{7}{2}}{\frac{25}{6}}
Reduce the fraction \frac{125}{30} to lowest terms by extracting and canceling out 5.
\frac{7}{2}\times \frac{6}{25}
Divide \frac{7}{2} by \frac{25}{6} by multiplying \frac{7}{2} by the reciprocal of \frac{25}{6}.
\frac{7\times 6}{2\times 25}
Multiply \frac{7}{2} times \frac{6}{25} by multiplying numerator times numerator and denominator times denominator.
\frac{42}{50}
Do the multiplications in the fraction \frac{7\times 6}{2\times 25}.
\frac{21}{25}
Reduce the fraction \frac{42}{50} to lowest terms by extracting and canceling out 2.
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}