Solve 20+10.5-8/7*5=

$$20+ \frac{ 10.5-8 }{ 7 } \times 5=$$

Evaluate

$$\frac{305}{14}\approx 21.785714286$$

Solution Steps

Subtract 8 from 10.5 to get 2.5.

$$20+\frac{2.5}{7}\times 5$$

Expand \frac{2.5}{7} by multiplying both numerator and the denominator by 10.

$$20+\frac{25}{70}\times 5$$

Reduce the fraction \frac{25}{70} to lowest terms by extracting and canceling out 5.

$$20+\frac{5}{14}\times 5$$

Express \frac{5}{14}\times 5 as a single fraction.

$$20+\frac{5\times 5}{14}$$

Multiply 5 and 5 to get 25.

$$20+\frac{25}{14}$$

Convert 20 to fraction \frac{280}{14}.

$$\frac{280}{14}+\frac{25}{14}$$

Since \frac{280}{14} and \frac{25}{14} have the same denominator, add them by adding their numerators.

$$\frac{280+25}{14}$$

Add 280 and 25 to get 305.

$$\frac{305}{14}$$

Factor

$$\frac{5 \cdot 61}{2 \cdot 7} = 21\frac{11}{14} = 21.785714285714285$$