PAL

Ptolemaeus Arabus et Latinus

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% (the percent sign) is the placeholder for no, one or more than one character.
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At the beginning and at the end, these placeholders are superfluous.

ἡ λοιπὴ εἰς τὸ τεταρτημόριον‘the complement of (the arc)’

Greek. – Grammar: sing.

References: Alm. Heiberg: II.2, 91:12
Translated into:
Arabic: (القوس) الباقية من الربع [Alm. MS Tunis: 20a.2]
Arabic: (القوس) الباقية لتمام الربع [Alm. MS Leiden: f. 14v]
Modern translations:
English: its complement [Alm. Toomer: 73]