Description:
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When calculating 90.99 minus 90.00 it returns 0.98999999999999 which is a bit big for a simple subtraction of two floats that only have 2 decimal numbers.

Reproduce code:
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<?php

	$calc = 90.99 - 90.00;
	print $calc;

?>

Expected result:
----------------
.99

Actual result:
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0.98999999999999