7th grade math mac please
posted by Delilah on .
18.
In 2000, the circulation of a local newspaper was 3,250. In 2001, its circulation was 3,640. In 2002, the circulation was 4,100.
a. Find the percent of increase in the newspaperâ€™s circulation from 2000 to 2001 and from 2001 to 2002.
b. Which period had a higher percent of increase, 2000 to 2001, or 2001 to 2002? (3 points)
2000  2001: 3640  3250 = 390
2001  2002: 4100  3640 = 460
390 divided by 3250 = 0.12
460 divided by 3640 = 0.1263736 = 1.26?

so 0.12 and 1.26 are the percent of increase

.12 or 12%
.126 or 12.6% 
So which one is right?

The percent change is (neworiginal)/original.
(3640  3250) / 3250 = 390 / 3250 = 39 / 325 = 3 / 25 = 12%
(4100  3640) / 3640 = 460 / 3640 = 46 / 364 = 23 / 182 = 12.637...%
The largest change came from 2001 to 2002.