① 100 kg rapeseed can extract 42 kg oil, 1 kg rapeseed can extract how many kg oil? ② Xiao Ming finished reading a book in a week. What percentage of the book does he read every day?

① 100 kg rapeseed can extract 42 kg oil, 1 kg rapeseed can extract how many kg oil? ② Xiao Ming finished reading a book in a week. What percentage of the book does he read every day?

42/100=0.42
1/7