1)tan's electricity bill for the month of august was $267. his september. bill showed a 2% increase from his august bill. in october, his bill decreased 8% from the amount he was nilled in august. how much did tan spend on electricity over the three-month period?
a) $800.94
b) $774.30
c) $827.70
d) $784.94

If you would like to know how much did Tan spend on electricity over the three-month period, you can calculate this using the following steps:

August: $267
September: 2% * $267 = 2/100 * 267 = $5.34
                   $267 + $5.34 = $272.34
October: 8% * $267 = 8/100 * 267 = $21.36
               $267 - $21.36 = $245.64

Now, you have to add this three numbers: $267 + $272.34 + $245.64 = $784.98

The result is none of the listed above, because the correct result is $784.98.