Formula
For calculating what percentage one number is of another, divide one number by another and multiply by 100.
Number 1Number 2 × 100
Say, we need to find out what percentage 12 is of 30:
1230 · 100 = 0,4 · 100 = 40%
So, 12 is 40% of 30.
1230 · 100 = 0,4 · 100 = 40%
So, 12 is 40% of 30.
A book contains 340 pages and a student is at page number 200 at the moment. What percentage of the book has the student currently read?
200340 · 100% = 0,59 · 100 = 59%
So, the student has read 59% of the book.
200340 · 100% = 0,59 · 100 = 59%
So, the student has read 59% of the book.