Compounding Frequency: Why Daily, Monthly and Yearly Differ
Same rate, three frequencies, three answers. The arithmetic, why the gap is smaller than people expect, and the one disclosed figure that has already done the sum for you.
savings
Simple vs Compound Interest, With the Arithmetic Shown
One formula multiplies and the other stacks. Here is the sum side by side, and the regulation that decides which of the two words is on any figure you are shown.
APR vs APY: Which Describes Borrowing and Which Describes Earning
Two nearly identical words defined in two different regulations. One ignores compounding by design and the other exists to include it. The definitions settle it.