Solve (142.5-128)div18*0.8

$$(142.5-128) \div 18 \times 0.8$$

Evaluate

$$\frac{29}{45}\approx 0.644444444$$

Solution Steps

Subtract 128 from 142.5 to get 14.5.

$$\frac{14.5}{18}\times 0.8$$

Expand \frac{14.5}{18} by multiplying both numerator and the denominator by 10.

$$\frac{145}{180}\times 0.8$$

Reduce the fraction \frac{145}{180} to lowest terms by extracting and canceling out 5.

$$\frac{29}{36}\times 0.8$$

Convert decimal number 0.8 to fraction \frac{8}{10}. Reduce the fraction \frac{8}{10} to lowest terms by extracting and canceling out 2.

$$\frac{29}{36}\times \frac{4}{5}$$

Multiply \frac{29}{36} times \frac{4}{5} by multiplying numerator times numerator and denominator times denominator.

$$\frac{29\times 4}{36\times 5}$$

Do the multiplications in the fraction \frac{29\times 4}{36\times 5}.

$$\frac{116}{180}$$

Reduce the fraction \frac{116}{180} to lowest terms by extracting and canceling out 4.

$$\frac{29}{45}$$

Factor

$$\frac{29}{5 \cdot 3 ^ {2}} = 0.6444444444444445$$