This is the 1563rd most frequent Japanese word.
割合
"割合" means "ratio" or "proportion" in English.
In this sentence, '割合' refers to a proportion or ratio indicating how successful the product is compared to others.
その製品の成功の割合は高いです。
The ratio of success for that product is high.
Here, '割合' is used to mean 'relatively' or 'comparatively,' indicating the ease of understanding his statements.
彼の発言は割合簡単に理解できました。
His statements were relatively easy to understand.
In this case, '割合' again implies 'relatively,' showing a degree of favorability towards the product among customers.