By law, you should claim 100%.
"The Income Tax Act is clear about income from tips: tips are taxable and it is your responsibility to report any that you receive. When you earn tips and do not report them, you are participating in the underground economy—you are increasing the tax burden on your friends, family, and neighbours, who have all of their income reported by their employers on their T4 slips.
Deliberately deciding not to report your tips is also illegal. If CRA auditors and investigators find that you are not reporting all your sources of income, you may be audited, face fines, penalties, or potential jail time."
http://www.cra-arc.gc.ca/nwsrm/txtps/2014/tt140805-eng.html