Question

Today 15% of all 6th graders Of Bloomingvale Middle School go to the field trip to Museum of Science. How many students go to the museum, if total there are 120 sixth graders in the school?

Answer 1

The answer is 18 because:

15%=15/100

15% of 120=15% * 120=15/100 * 120=1800/100=18

Answer 2

$\frac{x}{120} = \frac{15\%}{100\%} \\ x = i \: dont \: have \: calculator \: \: with \: me$
15 divide by 100 times 120
you can do it