FA-11384 / Spreadsheet calculation semantics / Member archive

Percent formatting changes the stored numeric value · case 04

Applying percentage formatting multiplies the stored cell value.

Member previewVariant 4 · 3 implementations · 6 checks per implementation

Case contract

For a finite float input whose binary floating-point product value*100 is also finite, and decimal places 0..3, return [unchanged stored value, fixed-point display of that product with percent suffix]. This is a formatting-only operation using Python float formatting, not exact decimal arithmetic.

Why this case matters

This isolated spreadsheet model makes cell semantics explicit; it does not claim compatibility with every workbook engine.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
fraction stored unchanged	`[50.0, "50.0%"]`	`[0.5, "50.0%"]`	Failed

MEMBER ARCHIVE

The complete case is available to members.

This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

Member access is invitation-based. Sign in with your invited account to inspect the sources.