[albie]

I don’t believe 1/2 of a $100 bill counts

[alstewartfan]

It’s called “laundering”, but even Tide will not help clean the final product.

[j.havenfarm]

If at least half of a bill is presented, the government will replace it
https://www.bep.gov/services/mutilated-currency-redemption

[Vigilanteman]

3/5th of a bill is worth 100% of face value. 1/2 of a bill is worth 50% of face value. Anything less than that is worth nothing.

[Ikeon]

51% of a bill is all you need to cash it at a bank. eeif it has been “dog laundred”.