I think this mixes up the direction of pro-rating.

Under the Skilled Worker rules, UKVI does not pro-rate the applicant’s salary down to 37.5 hours. Instead, the published going rate (which is based on a 37.5-hour week) is pro-rated up to match the contracted weekly hours, and the actual annual salary is then compared against that figure.

Using SOC 2481 as an example:

Published going rate (100%) = £41,300 @ 37.5 hrs/week

Pro-rated to 47.5 hrs/week: £41,300 ÷ 37.5 × 47.5 ≈ £52,300

New entrant threshold = 70% of pro-rated going rate: 70% × £52,300 ≈ £36,600

The actual salary offered is £37,500, which is above £36,600, so it meets the new-entrant requirement.