How do you find the percent change given the original number is 50 and new number is 30?

1 Answer
Jan 20, 2017

Answer:

See the solution process below:

Explanation:

The formula for calculating the rate or percentage change is:

#p = (N - O)/O * 100#

#Where:

#p# is the percentage change
#N# is the New Value (30 in this case)
#O# is the Old Value (50 in this case)

Substituting and solving for #p# gives:

#p = (30 - 50)/50 * 100#

#p = (-20)/50 * 100#

#p = (-2000)/50#

#p = -40#

The percentage change is #-40%#