Is -2.5 a real number, rational number, irrational number, integer, or a whole number?

Adifferent website gives the cost for the first train as £56.88 and the second train as £20.11 with a £9.50 charge for cycle storage for the whole trip. how much would the journey cost you?

Mustafa contributes 11% of his $67,200 annual salary to his 401k plan. what is his pretax income

Write 17/20 as a decimal and as a percent.