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Uses & Abuses of Percentages (ways of using percentages (to descibe…
Uses & Abuses of Percentages
ways of using percentages
to descibe change
Relative
Absolute
for comparisons
using as fractions
percentages of percentages
change comparisons by percents
OF v.s More Than
P% more than ref. value = (100+P)%
P% less than ref.value = (100-P)%
percentage v.s percent (%)
% sign
relative change/ difference
% points
absolute change/ difference
Abuses of percentages
less than nothing
do not average percentages
beware of shifting reference values