My Landlord Said 15% Increase, I Thought It Was $15
Last month my landlord said "rent increase 15%". My rent was $800. I stupidly added $15. He laughed. He meant $120 increase. I almost had a fight because I didn't know how percentage increase works.
Why Percentage Increase Confuses Everyone
We think in dollars, but world talks in percentages. Your supplier says "price up 8%", your client says "budget increase 12%". If you can't calculate it fast on your phone, you look unprofessional and lose money.
The Formula That Saved Me
Increase Amount = Original Price x (Percentage / 100)
Example: $800 x 15/100 = $120. New rent = $800 + $120 = $920.
Free Tool Advice
Don't stress with phone calculator. I use a free percentage increase calculator on invoiceluxe. Type 800 and 15%, it instantly shows $120 increase and $920 new price. It's free, no signup, works on mobile. I use it before every negotiation now.

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