TWO of the very best teachers on the Internet respond.

So learn your fractions! the entry point to calculus.
Don’t let me teach you fractions in Precalc 11 as I so often do!

To learn fractions, go to www.
And then start going through the videos and practice exercises. You don’t need to go to school to learn calculus. So no worries about grades or whatever. Have fun. Enjoy the ride.