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Answer 1 · 2017-06-07T21:45:27

#97.5%#

Percentage value #=# Fraction value × #100%#
Percentage value#=39/40×100%#
Percentage value #=97.5%#

Answer 2 · 2017-06-07T21:46:42

See a solution process below:

"Percent" or "%" means "out of 100" or "per 100", Therefore x% can be written as #x/100#.

Therefore we can write and equation to solve for #x# as:

#x/100 = 39/40#

#color(red)(100) xx x/100 = color(red)(100) xx 39/40#

#cancel(color(red)(100)) xx x/color(red)(cancel(color(black)(100))) = 3900/40#

#x = 97.5#

#39/40 = 97.5%#