Solve 7,9:79+0,5^2/-0,4=

$$\frac { 7,9 : 79 + 0,5 ^ { 2 } } { - 0,4 } =$$

Evaluate

$$-0,25$$

Solution Steps

Expand \frac{7,9}{79} by multiplying both numerator and the denominator by 10.

$$\frac{\frac{79}{790}+0\times 5^{2}}{-0,4}$$

Reduce the fraction \frac{79}{790} to lowest terms by extracting and canceling out 79.

$$\frac{\frac{1}{10}+0\times 5^{2}}{-0,4}$$

Calculate 5 to the power of 2 and get 25.

$$\frac{\frac{1}{10}+0\times 25}{-0,4}$$

Multiply 0 and 25 to get 0.

$$\frac{\frac{1}{10}+0}{-0,4}$$

Add \frac{1}{10} and 0 to get \frac{1}{10}.

$$\frac{\frac{1}{10}}{-0,4}$$

Express \frac{\frac{1}{10}}{-0,4} as a single fraction.

$$\frac{1}{10\left(-0,4\right)}$$

Multiply 10 and -0,4 to get -4.

$$\frac{1}{-4}$$

Fraction \frac{1}{-4} can be rewritten as -\frac{1}{4} by extracting the negative sign.

$$-\frac{1}{4}$$

Factor

$$-0,25$$