Seems that this problem wouldn't be fixed. You can use one of the following workarounds:
multi-line strings:
f"""foo "${math.abs(-0.9876f)*100}%1.1f%""""
\042
:f"foo \042${math.abs(-0.9876f)*100}%1.1f%\042"
${'"'}
:f"foo ${'"'}${math.abs(-0.9876f)*100}%1.1f%${'"'}"