Fixed asset register Note to the accounts

Hello tutors

The Notes to the accounts normally have a fixed asset register note which says

B/f balance
Additions
Disposals
Fx translation effects
C/f balance

If we have a group where a subsidiary has fixed assets in foreign currency

How would we calculate the effect of the fx translation on the fixed assets in the foreign subsidiary? If we normally only do the translating of the net assets or its trial balance

Thanks