(1) Subject to this Part, the weekly rate of working family payment shall be 60 per cent of the amount by which the weekly family income is less than the amount appropriate in the particular case under section 228.
(2) In calculating the weekly rate of working family payment under subsection (1), any fraction of €1 shall be treated as €1 and where the weekly rate so calculated is below a prescribed amount, the supplement shall be payable at the prescribed amount.