Simplify the following text for a Grade 11 native English-speaking person.
Original: According to one Britannica website , 46 % of its articles were revised over the past three years ; however , according to another Britannica web-site , only 35 % of the articles were revised .
Simplified: One Britannica website says that 46 % of the articles were revised in the past three years ; but another Britannica web-site says only 35 % of the articles were revised .