のわりに

for; considering

→ の
phrase Rare #38,335
for; considering Follows a noun to describe something that is surprising or unexpected given it. Often written のわりには when は adds emphasis.
JA: この店は値段のわりにおいしい。
EN: This restaurant is good for the price.

母は、年のわりには若く見えます。

My mother looks young for her age.

彼のお母さんは年のわりには若く見える。

His mother looks young for her age.

彼女は年のわりには若く見える。

She looks young for her age.