Hello, I was wondering if you could help me with a question? Yesterday my daughter came to me and asked if I could help her solve these three problems.
- 18 percent of 25 is what?
- 18 percent is what of 25?
- 25 is what percent of 18?
Thanks for helping me out. Hi Pete First, I would say that using percent in the age of calculators is bit of 'abacus arithmatic'. I know it is still in the curiculum and in lots of vocabulary, but really is just an extra burden on the real issues. [I was struck by this, again, the last time I did my taxes ; ( ]
The WHAT is the variable in an algebra question - so you may have to write something, change the appearance then use the calculator.
- 0.18 x 25 = [What]?
Yes [What] = 4.5. - 0.18 x [What] = 25?
That means [What] = 25 / 0.18 - a different calculation and a different answer. - 25 = [What] x 18 / 100?
[What] = 25 x 100 / 18. - different again.
Walter Whiteley |