Most of us associate the concept of IQ, the intelligence quotient, as a measure of intelligence in terms of a capacity to solve problems.
So too with the concept of FQ, the financial quotient. It is a measure of financial intelligence. It embraces intelligence in the same way as IQ, obviously with a narrower focus. However, it does represent a whole way of thinking made up of a number of parts such as overall fitness, credit intelligence and budgeting intelligence.
How to improve FQ? .... I suggest you read more and practice what you read.