How to solve proportions without mistakes
Direct and inverse proportions, percentages, multi-step problems and the everyday situations where cross-multiplying gives a wrong answer.
· 6 min read
Practical guides
Step-by-step explanations, with real examples, on the topics our tools cover.
How to calculate the days between two dates
The by-hand method, when to count the last day, how to count business days, and the Excel formulas that do it for you.
· 6 min read
How to add hours and minutes
Why time doesn’t add like decimals, how to subtract by borrowing an hour, AM/PM and night shifts, and the minutes-to-decimal table for timesheets.
· 5 min read