Answer
$ 90.14\%$ of emails are spam or viruses.
Work Step by Step
Typical percentage problem:
What percent ($n$, as a decimal number) of (the base amount $y$) is $x?$
Translated:$\quad n\cdot y=x$
---
Here, What percent ($n$, as a decimal number) of ($y=294$ is ($x=265$)$?$
Translated:$\quad n\cdot 294=265$
... divide with $294$
$ y=0.9014\qquad$ .... convert to percent notation,
(move the decimal point two places to the right and write a percent symbol.)
$=90.14\%$
