We can say that knowledge is a branch of learning information, understanding, or skill that you get from experience or education awareness of something
Knowledge in general means information-something that is known or may be known. This might be called as personal knowledge of someone.
Knowledge might not mean a real understanding. It might be a theoretical, practical or both theoretical and practical understanding to certain extent. May be, the knowledge of something is known to someone at certain time, but the interpretation (the basis of knowledge) may differ, and a renewed form of awareness (knowledge), information or knowing might become knowledge (better knowledge).
Knowledge is not only what is known. What is known to me is my knowledge. What is not known is also knowledge since that knowledge might be known to someone else or others but not me.
It means that the word KNOW in KNOWLEDGE has a complete range (0%-100%) (knowing or knowing nothing) for certain information. i.e. something might be known to someone (a little, more, or complete (but never with the reality or real interpretational knowledge) or not at all.
Science in above regard is the knowing of something with experience or education. e.g. Today's Science has certain information, but there is certain information not known (hidden for someone or may be for all people). Tomorrow's Science will have more information or knowledge, and so on...That means, the purpose of Science is to acquire more and more knowledge with newer technology (applied knowledge) and modern pure knowledge.
Hence, conclusively, KNOWLEDGE in my viewpoint is the sum of known and unknown information, since some of the unknown information becomes known for someone in the progression of time and so on...
Knowledge is a familiarity, awareness, or understanding of someone or something, such as facts, information, descriptions, or skills, which is acquired through experience or education by perceiving, discovering, or learning