Mr Jeffery going through some non-calculator examples of finding an original amount when given an amount that has had a percentage taken from or added to it. We find that this number is 25 of some original number. Multiply this 1 by 100 to find the original price 100 previous 1 2.
AQA GCSE maths revision practice paper 4.
The difference between 40 and 50 is 10 50 - 40 10. First work out the difference between the two numbers 40 and 50. Therefore the original number can be calculate as 1004400. So you must provide an original quantity and a new quantity.