# Maths Revision

- Created by: jonah spong
- Created on: 08-11-17 19:48

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- Maths
- Reverse Percentages
- Increase:
- An Xbox One costs $200 in a 25% sale. What did it originally cost?
- 200 (number) * 1.25 (Percentage +1) = 250

- An Xbox One costs $200 in a 25% sale. What did it originally cost?

- Increase:
- Standard Form
- M (a number between 1 and 10) * 10 to the power of N (an integer determined on how much a decimal has moved)
- Small Numbers:
- 6 * 10^-4 = 0.00006
- 3.29 * 10^-4 = 0.000329

- Small Numbers:

- M (a number between 1 and 10) * 10 to the power of N (an integer determined on how much a decimal has moved)

- Reverse Percentages
- Large numbers.
- 8 * 10^3 = 8000
- 7.24 * 10^5 = 724,000
- M (a number between 1 and 10) * 10 to the power of N (an integer determined on how much a decimal has moved)
- Small Numbers:
- 6 * 10^-4 = 0.00006
- 3.29 * 10^-4 = 0.000329

- Small Numbers:

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