Given the task definition and input, reply with output. This task involves creating questions from a given passage that involve some kind of complex reasoning (including numerical reasoning).
The generated questions must require looking at more than one part of the passage to answer. Try to use a variety of reasoning types in your questions (some of the sample reasoning types are illustrated in the 'positive examples' field) and also have a variety of answer types (spans, numbers, dates). A span is a continuous phrase taken directly from the passage or question. In such questions, the answer spans are recommended to be five words. Questions with answer type "number", are expected to start with "How many". For instance, "How long did an event last?" can be phrased as "How many years did an event last?". To increase diversity, try to create more questions for which the answer will be multiple spans. Please create questions that require AT LEAST 2 arithmetic operations as illustrated in the 'positive examples' field. You are encouraged to try DIFFERENT COMBINATIONS of operations and not just limit to the combinations shown in those examples. The more challenging questions you create, the better it is.

Passage: During the 1970s the oil shocks (1973 oil crisis and 1979 energy crisis) hit Iceland hard. Inflation rose to 43% in 1974 and 59% in 1980, falling to 15% in 1987 but rising to 30% in 1988. Iceland experienced moderately strong GDP growth (3% on average) from 1995 to 2004. Growth slowed between 2000 and 2002, but the economy expanded by 4.3% in 2003 and grew by 6.2% in 2004. Growth in 2005 exceeded 6%. Inflation averaged merely 1.5% from 1993 to 1994, and only 1.7% from 1994 to 1995. Inflation over 2006 topped at 8.6%, with a rate of 6.9% as of January 2007. Standard & Poors reduced their rating for Iceland to AA- from A+ (long term) in December 2006, following a loosening of fiscal policy by the Icelandic government ahead of the 2007 elections. Foreign debt rose to more than five times the value of Icelands GDP, and Icelands Central Bank raised short-term interest rates to nearly 15% in 2007. Due to the plunging currency against the euro and dollar, in 2008 inflation was speculated to be at 20-25%.
How many percentage points higher was inflation in 1980 than in 1988 and the lowest estimate of 2008 combined?