Use the symbol with no space between it and the number.
Always write “percentage” and never %age.
Use the same number of decimal places for a sequence of decimal numbers.
6.25% and 7.60%
A percentage point is the difference between percentages. A value of 10% falling by one percentage point becomes 9% (10% has ten percentage points). A fall of 1% would result in a value of 9.9%