Guides & Articles — Practical How-Tos | ToolKit
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Articles & Practical Guides
Clear mathematical breakdowns, verified finance rules, and step-by-step guides to help you make smarter decisions.
All Published Articles (10)
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Should You Pay Off Your Loan Early? The Interest Math That Decides It
Paying a loan off early usually saves real money, but only when the extra cash goes to the principal and your loan has no penalty for it.
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How Old Do You Have to Be to Drive, Vote, Drink, and Rent a Car? (US vs UK)
In the US you can usually drive solo at 16, vote at 18, and buy alcohol at 21. In the UK you can drive at 17, vote at 18, and buy alcohol at 18.
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How to Calculate Percentage Increase (Prices, Pay Rises, and Inflation)
Percentage increase = (new value − old value) / old value × 100. A $100 item that now costs $103.70 has risen 3.7%.
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How Long Would It Take a Hacker to Crack Your Password? (2026 Data)
A random 8-character full-mix password takes about 132 years to crack offline — but a common or reused password falls instantly.
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What Score Do I Need on My Final Exam to Get an A?
The score you need on your final is (target grade − current grade × non-final weight) / final's weight. At 88% with a final worth 25%, you need 96% for an A.
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How to Split Rent Fairly With Roommates (It's Not Always 50/50)
Split rent fairly with roommates: equal, square-footage and amenity methods with worked examples, plus bills, couples and move-out rules.
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What GPA Do You Need to Get Into College? (2026 Admission Data by School Type)
What GPA do you need for college in 2026? Real admitted GPA data by school type, ED deadlines, and how to work out your number.
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How Much House Can I Afford on Your Salary? (US + UK Guide)
How much house can you afford on your salary? 28/36 rule, salary table, US + UK guide with examples at October 2026 rates.
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CGPA to Percentage: How to Convert CGPA into Percentage Correctly
What is 8.5 CGPA in percentage? It depends on your board. CBSE × 9.5, VTU, Mumbai University and 4.0-scale formulas explained with worked examples, tables and FAQs.
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7 Ways to Keep Your Online Passwords Safe (Before It's Too Late)
Still using weak passwords? Here are 7 simple, proven ways to keep your accounts safe — from password managers to enabling 2FA.
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