In order to be able to learn algebra, you need to be fluent with basic topics covered in elementary math. This includes arithmetic operations like addition, subtraction, multiplication, and division, as well as an understanding of how fractions work. It is also important to have a solid grasp of non-integer numbers like decimals and percentages, as well as how they’re related to one another. Proportions and ratios are also important in algebra, as is probability. Knowing formulas for basic geometrical shapes also helps: it’s great to enter algebra knowing the formula for the circumference of a circle, the area of a rectangle, perimeters, and other basic formulas. Also, be sure to understand the concept of what an integer is and how the number line works.