Tiny Math Tricks that Save Big Time at Work

You don’t need to love math to make it work for you. A handful of mental shortcuts plus a reliable calculator can remove uncertainty from day-to-day decisions.

• Rule of 70: For growth rates, 70 ÷ growth% ≈ doubling time.
• 10% ladder: Find 10%, then scale to 5% or 1% quickly.
• Margin sanity check: Revenue × margin% ≈ contribution; test scenarios with the Percentage Calculator.

Build these into your routine and numbers stop feeling fuzzy—they become decisions.