9/20 = 45%
A value like 9/20, or 45%, might describe how much of a class chose a certain lunch option or how much battery is left on a device. It’s a little less than half, so it can feel close to an even split.
To picture 9/20 quickly, imagine a bar divided into 20 equal parts, with 9 shaded. You can also think of it as nearly half the bar, with just a small bit missing.
One common mix-up is treating 45% as exactly half; half is 50%, so 45% is slightly lower. That difference can matter when comparing prices, scores, or survey results.