Firstly, measure the dimensions of the balloon, such as its radius or diameter. The volume of a balloon can be approximated as that of a sphere, so you can use the formula for the volume of a sphere to calculate it. The formula is V = (4/3)πr³, where V represents the volume and r denotes the radius.
Fortunately, Excel can be used to create an amortization schedule. The amortization schedule template below can be used for a variable number of periods, as well as extra payments and variable interest rates.