Question

One day 10% of the students enrolled in the school were absent. There were 1,620 students present on that day. How many students were absent?

Answer 1

10% = 0.1
So, 1,620 * 0.1 = 162
162 students were absent. 
Sounds like a terrible school. 

Answer 2

You might want to add or subtract 1,620 and 10% to find the total then make sure to put the 10% into a 0.10