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Simple Interest vs Compound Interest — Worked Comparison
Simple vs compound interest, worked with real numbers: $10,000 at 8% for 5 years, full year-by-year tables, Rule of 72, and where each type is used.
How to Convert Percentage to GPA (US 4.0 Scale)
Convert percentage to GPA on the US 4.0 scale: the official band table, weighted vs unweighted GPA, a worked example, and international conversions.
How to Calculate Fuel Cost for a Road Trip
How to calculate fuel cost for a road trip: the exact formula, a worked 480-mile example at 30 MPG, plus round-trip, passenger-split, and EV charging math.
How to Split a Restaurant Bill and Calculate Tip
How to split a restaurant bill and calculate tip: the exact formula, a worked $120-for-6 example, plus the fair proportional method for uneven orders.
Usable vs Rentable Square Footage: How the Load Factor Works
Usable vs rentable square footage explained: the load-factor formula, a worked 1,650 sq ft example at 32% load, and the checks to run before you sign.
How to Calculate Percentage Increase Between Two Numbers
How to calculate percentage increase between two numbers: the exact formula, a worked $4,200 to $4,830 salary example, and the base mistakes to avoid.
How to Calculate EMI on a Home Loan — A Worked Example
How to calculate EMI on a home loan: the exact formula, a worked $300,000 example at 6.75% over 30 years, and how extra monthly payments cut interest.
Vikram Samvat to Gregorian Year Conversion, Explained — With Worked Examples
Vikram Samvat to Gregorian conversion: the +57 and +56 rules, why the year number changes mid-year, and worked 2026 examples for North India and Gujarat.