Percentage Change: Change/original x 100
Finding Ratio Amounts:
1. Add up the parts
2. Find the amount for 'one' part
3. Multiply the answer of 2 by the amount of parts
Express x as a percentage of y
e.g.
Give 40p as a percentage of 3.34
(40 / 334) x 100 = 12%
if you want to know an amount before a certain percentage was added you divide the amount by the multiplier of the amount we have at the start
HCF  the biggest number that will divide by all the numbers in the question
The Factors of a number are all the numbers that divide into it
irrational numbers:
NEVER ENDING NON RECURRING DECIMAL (e.g. most square and cube roots)
Created by lydiarutherford
over 3 years ago

