Pick a parking lot. Count total spaces, then count occupied ones. Express as a fraction, decimal, percentage.
Edit the data — the chart follows
Turning a count into three numbers
- Count total spaces, then count occupied spaces.
- Write it as a fraction: occupied / total.
- Simplify, then divide to get the decimal.
- Multiply by 100 for the percentage — three names for one ratio.
Your turn
A lot has 150 spaces and 96 are taken. What percent is full?
Sample the same lot at several times and plot the percentages in order — that line is a time series, the backbone of real demand data.
Try it
84 occupied / 120 total
Fraction 84/120 = 7/10. Decimal 0.7. Percentage 70%. Three ways to say the same thing.
Repeat at the same lot at three different times. Plot the results — that's your first time-series.