You start at 100. Calculate -20%, +20%, -20%, +20%. Which number do you get?

Too lazy, sorry. What's important is to know instinctively that it's less than 100. Most people struggle with that, as a result of years of disrespecting math at school and throughout life.

Zap to Zero Day 4

> You start at 100. Calculate -20%, +20%, -20%, +20%. Which number do you get?

Too lazy, sorry. What's important is to know instinctively that it's less than 100. Most people struggle with that, as a result of years of disrespecting math at school and throughout life. 