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

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Answer 1 · 2017-01-20T20:24:36

See the solution process below:

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%#