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When you have a problem of this type
"The value of X increased from "a" to "b". By what percentage did the value of X increase ?"
it is important to relate the difference to the right base.
The common agreement is that in such problems, the difference should be related to the original value,
i.e. to value of "a", in this case.
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| If the opposite is not pronounced openly, directly and explicitly. |
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AGAIN, by default, the percentage of change from "a" to "b" is
Percentage of change from "a" to "b" = %.
Answered and explained.
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On percentage problems, see the lessons
- Percentage problems
- Percentage word problems (Type 1 problems, Finding the Part)
- Percentage word problems (Type 2 problems, Finding the Rate)
- Percentage word problems (Type 3 problems, Finding the Base)
- Simple percentage problems
- More complicated percentage problems
- Advanced problems on percentage
- Problems on percentage that lead to unexpected results
- Simple interest percentage problems
- Compound interest percentage problems
in this site.
They are written specially for you.
Read them and become an expert in this area.
Start from the very first lesson of the list.
Consider these lessons as your textbook, handbook, tutorials and (free of charge) home teacher.