There are 209 7th graders this year. This is a 5% decrease from last year. How many 7th graders were there last year?

220

Step-by-step explanation:

okay, so 209 7th graders this year

since there was a 5 percent decrease from last year, 209 is 95 percent of the 7th graders from last year

so then we can set up a proportion

209/0.95=x/1

we can cross multiply

0.95x=209

x=220