40 percent plus 20 percent plus 10 percent is 70 percent. That means 70 percent of the pens in the shop are not red and the other 30 percent are. If you want to know the exact amount do 30 percent of 400 which is 400 divided by 3.33 which is approximatly 120.
There are 3600 seconds in 1 hour. 3600×132=475200 feet per hour. now you need to convert feet to miles. which is 90miles. 90 miles per hour is the answer
