To find the percent of something, turn the percent into a decimal and multiply (move the decimal place 2 places left, e.g. 53% = .53)
To do this, change into common denominators. The common denominator is 21 so change the problem from 1/3 + 1/7 to 7/21 + 3/21. This gives you 10/21. It is already in simplest form.
Here is how to solve it with long division and synthetic division.
210-147 so he has 63 more pages to read I just kept putting numbers in and multiplying by .7 till I got 147 from 210
