Complex sentence: The Chancellor of the Exchequer is the title held by the British Cabinet minister who is responsible for all economic and financial matters, equivalent to the role of Minister of Finance or Secretary of the Treasury in other nations.
Split into simpler sentences: The Chancellor of the Exchequer is the title held by the British Cabinet minister who is responsible for all economic and financial matters. Often simply called the Chancellor, the office-holder controls HM Treasury and plays a role akin to the posts of Minister of Finance or Secretary of the Treasury in other nations.