1987 AJHSME Problem 12
Source:
June 25, 2011
geometryrectangle
Problem Statement
What fraction of the large by rectangular region is shaded?[asy]
draw((0,0)--(18,0)--(18,12)--(0,12)--cycle);
draw((0,6)--(18,6));
for(int a=6; a<12; ++a)
{
draw((1.5a,0)--(1.5a,6));
}
fill((15,0)--(18,0)--(18,6)--(15,6)--cycle,black);
label("0",(0,0),W);
label("9",(9,0),S);
label("18",(18,0),S);
label("6",(0,6),W);
label("12",(0,12),W);
[/asy]