Evaluate
\frac{89}{70}\approx 1.271428571
Factor
\frac{89}{2 \cdot 5 \cdot 7} = 1\frac{19}{70} = 1.2714285714285714
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\frac{49}{70}+\frac{40}{70}
Least common multiple of 10 and 7 is 70. Convert \frac{7}{10} and \frac{4}{7} to fractions with denominator 70.
\frac{49+40}{70}
Since \frac{49}{70} and \frac{40}{70} have the same denominator, add them by adding their numerators.
\frac{89}{70}
Add 49 and 40 to get 89.
Examples
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Linear equation
y = 3x + 4
Arithmetic
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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]
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
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