What does 0.7 mean in maths?
0.7 is seven over ten or seven tenths this is written as 7/10
Maths is a science. It's not the typical science people think of, but it is a science. Science is a maths-based subject. You need maths in science but you don't need 'science' in maths. Your question can be interpreted in different ways, but it really depends on what you mean by science or maths and the definition you use.