Solve 121-0.4^7/0.6

$$12 \frac{ 1- { 0.4 }^{ 7 } }{ 0.6 }$$

Evaluate

$$19.967232$$

Solution Steps

Calculate 0.4 to the power of 7 and get 0.0016384.

$$12\times \frac{1-0.0016384}{0.6}$$

Subtract 0.0016384 from 1 to get 0.9983616.

$$12\times \frac{0.9983616}{0.6}$$

Expand \frac{0.9983616}{0.6} by multiplying both numerator and the denominator by 10000000.

$$12\times \frac{9983616}{6000000}$$

Reduce the fraction \frac{9983616}{6000000} to lowest terms by extracting and canceling out 384.

$$12\times \frac{25999}{15625}$$

Express 12\times \frac{25999}{15625} as a single fraction.

$$\frac{12\times 25999}{15625}$$

Multiply 12 and 25999 to get 311988.

$$\frac{311988}{15625}$$

Factor

$$\frac{3 \cdot 25999 \cdot 2 ^ {2}}{5 ^ {6}} = 19\frac{15113}{15625} = 19.967232$$