This is the 2336th most frequent Arabic word.
بأكبر
"بأكبر" means "with the largest" or "in the largest" in English.
Here, 'بأكبر' is used to describe 'محرك' (engine), emphasizing that the choice is based on the size criterion.
أنا سأشتري السيارة بأكبر محرك.
I will buy the car with the largest engine.
In this sentence, 'بأكبر' functions similarly, qualifying 'مساحة' (area), specifying the comparative quality of size.
نحن نعيش في المنزل بأكبر مساحة في الحي.
We live in the house with the largest area in the neighborhood.
'بأكبر' here attaches to 'نسبة' (percentage), indicating the maximum extent achieved within the context.