How do you find the percent change given before:90 and after:200?

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Answer 1 · 2016-11-30T21:58:22

The percent change is #122.bar2%# or 122.2% rounded to the nearest 10th.

Percent change of two values can be determined using the formula:

#p = (N - O)/O * 100# where #p# is the percent change, #N# is the New Value and #O# is the Old Value.

We are given the New Value (after = 200) and the Old Value (before = 900) which we can substitute into the formula and calculate the percent change:

#p = (200 - 90)/90*100#

#p = 110/90*100#

#p =11000/90#

#p = 122.bar2%#