Relative error help

The quantity T is defined by the formula

T = (3a²b^3/2)/c⁴

If the relative errors in a, b and c are -0.015, 0.02 and 0.0025, respectively, find

(i) the relative error in T;
(ii) the maximum relative error in T.

I'm a bit confused :sick: if anyone would care to explain I would be grateful.

By relative error do you mean fractional/percentage error?

I don't know what it means, that's why I'm asking for help :P