a lot, an average of 20-30 per day, five days a week for the past 4-5 years and roughly 8-17 per day, five days a week before then
ask your parents
Not really sure in what unit youre asking for, id be happy to help if you gave me the units you're looking for.
i personally recommend desmos.com , it has helped me many times
12.5%
just do 1 divided by 8, and multiply by 100