Calculatiing percentages:
Hack to make the calculations of percentages simple in your head:
x% of y = y% of x
So, for example, if you need to work out 4% of 75 in your head, just flip the numbers around, so 75% of 4, which is 3.
And 23% of 320 is 320% of 23 = (23 x 3 = 69) + ((23 * .2) = 4.6) = 73.6!
Google:
Of course, google can probably help you out too:
Eg: work out what x is here?:
x - (x * 0.1) = 55.55
Outputs:
CE and C on a calculator:
On a different subject, ever wondered what C and CE denote on a calculator?
The C (clear) button will clear all inputs to the calculator while the CE (clear entry) button clears the most recent entry.
