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.

the complement of (the arc) ‘the complement of (the arc) in degrees’

English

References: Alm. Toomer: 73
Translation of:
Greek: αἱ λοιπαὶ εἰς τὸ τεταρτημόριον μοίραι [Alm. Heiberg: I.16, 84:14]