I did, and you can too. Here’s how: 4/17 is about 4/16 = 1/4 = 0.25, but a little less because 1/16 is greater than 1/17. The error term is about 4/(16^2) or 4/250, so subtract about another 2 hundredths to 0.23.
4/17 is less than 4/16 (0.25) but more than 4/20 (0.2). It’s on the fatter side of that difference, so I would go with 0.225 with some rounding… If I need a better answer than 0.22 or 0.23, I’ll use the calculator
Gonna be honest my guy I don’t believe you did 4/17~=0.23 in your head. And if you did, great for you but, most people can’t do that.
I did, and you can too. Here’s how: 4/17 is about 4/16 = 1/4 = 0.25, but a little less because 1/16 is greater than 1/17. The error term is about 4/(16^2) or 4/250, so subtract about another 2 hundredths to 0.23.
Or my thinking:
4/17 is less than 4/16 (0.25) but more than 4/20 (0.2). It’s on the fatter side of that difference, so I would go with 0.225 with some rounding… If I need a better answer than 0.22 or 0.23, I’ll use the calculator