Percentages galore

The simplest way to solve this problem is to try out every value.

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$11\%$ of $87$ is the same as $0.11(87) = 9.57$

$22\%$ of $65$ is the same as $0.22(65) = 14.3$

$33\%$ of $43$ is the same as $0.33(43) = 14.19$

$44\%$ of $21$ is the same as $0.44(21) = 9.24$

Now it's quite clear that the highest value is of $22\%$ of $65$ .