Yesterday 5% of the 120 sixth graders at a school were late. How many sixth graders were late please explain and show work need by today thank you!

Question

Please explain and show work thank

you I need buy today please. 

Answer 1

Hi Nicole--

 

6 kids were late. Here's why:

 

"5 per cent of 120" can be shown as this proportion:

 

5/100 = n/120

 

which means " 5 out of 100 is equal to ?? out of 120."

 

to solve, you cross multiply to get 100n = 600   (because 5 x 120 = 600)

 

divide by 100 and you get that n = 6.

 

The other way to do it is  120 x .05, which is the same as doing 120 x 5 but with the decimal point moved 2 places on the place value chart.

 

Hope this helps!

 

Matt in New York