The net present values (NPV) of two mining project proposals A and B are as given.

$[ NPV_A = -0.01i^2 - 0.02i + 4.44 ]$

$[ NPV_B = -0.03i^2 - 0.01i + 6.55 ]$

where, ($i$) is discount rate.

The required rate of return for which both the proposals have equal possibility of acceptance and rejection, is ______. (round off to two decimal places)