math
posted by deedee .
A school had 900 students at the start of a school year. If there is
an enrollment increase of 7% by the beginning of the next year, what is the new
enrollment?

math 
Damon
1.07*900

math 
Damon
In other words 100 percent (1.00) plus the new 7 percent (0.07) = 107% or 1.07

math 
Anonymous
7%100=.7
900/.7=1285.71 
math 
Anonymous
7%/100=0.07
900/0.07=12857.14 
math 
Damon
Anonymous,
7%/100 = .07 is correct
however to increase something by 7% you add .07 times the original amount. In other words multiply by 1.07.
What you did was find what 900 was 7% of, a very large number compared to 900.
Use the "does my answer make sense test". If I only increase 900 by 7% will it really be over twelve thousand? That sure would be a lot of new students.
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