Can 100 percent acrylic paint be used to paint over latex paint?

100% acrylic paint can definitely go over latex. Acrylic paint actually is the same thing as latex paint. Some manufacturers differentiate their products as 100% acrylic and also have a product called latex that is made of acrylic plus co binders and other additives. So while one is 100% acrylic and the other is a mixture they are both water based and considered latex.