Question 1080139

Traffic lights are green for 3/4 of the time and orange for 1/10 of the time. What fraction of the time are the lights red?
<pre>Green: {{{3/4}}}
Orange: {{{1/10}}}
Red: {{{highlight_green(matrix(1,5, 1 - 3/4 - 1/10, "====>", 20/20 - 15/20 - 2/20, "=", highlight(3/20)))}}}