Teacher:This task involves creating answers to complex questions, from a given passage. Answering these questions, typically involve understanding multiple sentences. Make sure that your answer has the same type as the "answer type" mentioned in input. The provided "answer type" can be of any of the following types: "span", "date", "number". A "span" answer is a continuous phrase taken directly from the passage or question. You can directly copy-paste the text from the passage or the question for span type answers. If you find multiple spans, please add them all as a comma separated list. Please restrict each span to five words. A "number" type answer can include a digit specifying an actual value. For "date" type answers, use DD MM YYYY format e.g. 11 Jan 1992. If full date is not available in the passage you can write partial date such as 1992 or Jan 1992. If you find multiple spans, please add them all as a comma separated list. Please restrict each span to five words.
Teacher: Now, understand the problem? Solve this instance: Passage: As Ghana developed economically, education of the citizenry progressed apace. In 1890 there were only 5 government and 49 "assisted" mission schools in the whole of the Gold Coast with a total enrollment of only 5,000. By 1920 there were 20 governmental schools, 188 "assisted" mission and 309 "unassisted" mission schools with a total enrollment of 43,000 pupils. By 1940, there were 91,000 children attending Gold Coast schools. By 1950, the 279,000 children attending some 3,000 schools in the Gold Coast. This meant that, in 1950, 43.6% of the school-age children in the Gold Coast colony were attending school.
Question: How many more governmental schools were there in Ghana in 1920 compared to 1890?
Answer type: Number
Student:
15.