Solve for: (y)/(10)=(4)/(8)

Expression: $\frac{ y }{ 10 }=\frac{ 4 }{ 8 }$

Cancel out the common factor $4$

$\frac{ y }{ 10 }=\frac{ 1 }{ 2 }$

Simplify the equation using cross-multiplication

$2y=10$

Divide both sides of the equation by $2$

$y=5$