Question 562274
1125= a times 15625
{{{1125=(a)(15625)}}}
{{{1125=15625a}}}

Divide by 15625 both sides
{{{1125/15625=15625a/15625}}}
{{{cross(1125)/cross(15625)=cross(15625)a/cross(15625)}}}
{{{9/125=a}}}
{{{a=9/125}}}