Percentage Difference based on selected slicer (per week, and per month)

try this: 

% Diff =
VAR SelectedDate = SELECTEDVALUE('Input Data'[Date])
VAR SelectedWeek = SELECTEDVALUE('Input Data'[Week])
VAR SelectedMonth = SELECTEDVALUE('Input Data'[Month])
VAR _PrevDate =
IF(
NOT(ISBLANK(SelectedDate)),
CALCULATE(
MAX('Input Data'[Date]),
FILTER(
ALLEXCEPT('Input Data', 'Input Data'[Model], 'Input Data'[Line]),
'Input Data'[Date] < SelectedDate
)
),
IF(
NOT(ISBLANK(SelectedWeek)),
CALCULATE(
MAX('Input Data'[Date]),
FILTER(
ALLEXCEPT('Input Data', 'Input Data'[Model], 'Input Data'[Line]),
'Input Data'[Week] < SelectedWeek && 'Input Data'[Month] = SelectedMonth
)
),
CALCULATE(
MAX('Input Data'[Date]),
FILTER(
ALLEXCEPT('Input Data', 'Input Data'[Model], 'Input Data'[Line]),
'Input Data'[Month] < SelectedMonth
)
)
)
)

VAR _PrevYield =
CALCULATE(
[Yield],
FILTER(
ALLEXCEPT('Input Data', 'Input Data'[Model], 'Input Data'[Line]),
'Input Data'[Date] = _PrevDate
)
)

RETURN
IF(
ISBLANK(_PrevYield),
BLANK(),
[Yield] - _PrevYield
)

test the dax with different combinations of slicers and modify the formula accordingly.