Finance
The arithmetic behind loans, interest and long-horizon saving — worked through rather than asserted, so the numbers a calculator gives you stop being magic. Explanations, not advice.
8 min read
The Math Behind Loan Amortization (With a Worked Example)
Where the monthly payment formula comes from, why early instalments barely touch the principal, and what that means for paying a loan off early.
5 min read
Compound vs. Simple Interest: What's the Difference?
Simple interest is charged on the original amount; compound interest is charged on the growing balance. The gap is huge over time.
5 min read
How Loan Payments Work (and How to Calculate Them)
Every fixed loan payment splits between interest and principal. Here is how the monthly figure is calculated and why early payments barely move the balance.