Solve 0.5/69.5=R/90

$$\frac { 0.5 } { 69.5 } = \frac { R } { 90 }$$

Solve for R

$$R=\frac{90}{139}\approx 0.647482014$$

Steps for Solving Linear Equation

Multiply both sides of the equation by 90.

$$90\times \frac{0.5}{69.5}=R$$

Expand \frac{0.5}{69.5} by multiplying both numerator and the denominator by 10.

$$90\times \frac{5}{695}=R$$

Reduce the fraction \frac{5}{695} to lowest terms by extracting and canceling out 5.

$$90\times \frac{1}{139}=R$$

Multiply 90 and \frac{1}{139} to get \frac{90}{139}.

$$\frac{90}{139}=R$$

Swap sides so that all variable terms are on the left hand side.

$$R=\frac{90}{139}$$