Maths

Question 1

Percentage change equation?

Answer 1

new value - original value _____________________________ x 100
original value

Question 2

Percentage profit equation?

Answer 2

selling value - cost value
___________________ x 100
cost value

Question 3

Percentage error equation if the measured value is smaller than the expected value?

Answer 3

expected value - measured value
__________________________ x 100
expected value

Question 4

Percentage error equation if the measured value is larger than the expected value?

Answer 4

measured value - expected value
__________________________ x 100
expected value

Question 5

What equation do you rearrange to find percentage increase?

Answer 5

new value = 100 + percentage increase
_______________________________ x original value
100

this rearranges to :

% increase = (new value/original value x 100) - 100

Question 6

What is the equation to finding percentage waste?

Answer 6

% waste = value including waste - value excluding waste
________________________________ x 100
value including waste