Problem with "historical quotes" retreived as percentage

In my portfolio performance, I have several secondary market bonds, such as the Republic of Turkey TURKEY 6 7/8 03/17/36, US900123AY60. Its nominal vaue is 1000 USD, the PP imported them from IbKR as 1000 pieces of 1 USD bonds. Since I have other bonds having 100 or 500 units nominal values per share, it seems OK with me.

I retrieve their prices from Ariva.de: 6,875% Türkei 06/36 auf Festzins (WKN A0GLU5, ISIN US900123AY60) - Historische Kurse - Aktien, Aktienkurse - ARIVA.DE .
For example, the price is “98.5,” which PP interprets as 1 USD worth of bonds equaling 98.5 USD, rather than the correct percentage, where 1 USD worth of bonds equals 98.5%, aka 0.985 USD. How can I manually adjust the price interpretation for each bond affected by this error?

Does this help Managing bonds - Portfolio Performance Manual?

Thanks. It also states: “However, -if necessary- they can be downloaded in table format from for example the ariva.de website . It’s important to note that bond prices in historical records are typically expressed as percentages, ranging from 0 to 100%, rather than in a specific currency like EUR, as is common for shares.”

how can i adjust this in the historical quotes of these securities?

It is much easier to work with the correct number of units and the correct face value than with unnecessarily adjusted quotes.

Just use 10 units to 100 instead of 1000 units to 1.