460
1) If there are 400 students and there was an increase of 15% then to find out the new number of students, we need to write the following
400 (1 + 0.15) Rewrite 15% as 0.15 add to 1
400 (1.15) Now multiply it
460 students
2) Note that:
• That 1 represents 100% or that 400, and 0.15 the increase
,• Alternatively, you can set a proportion to find that out:
400---------------- 100%
x ---------------------115%
x=46000/100
x=460
Either way, you'll find that increase of 15% over that.
3) Hence, the answer is 460
