A two percent road grade is a grade where the road rises 2 units for every 100 units travelled.100 feet horizontal travel, will result in a two foot gain in elevation.It is a relatively shallow gradient.
for every 100 feet of road you travel, you rise 9 feet
it would look like this: 2/100 or reduced its 1/50
If you're asking why the symbol is % - It's a contraction of 'per one hundred'. The line and two small zero's signify the number 100.
a circle with a certain percent at a certain mesurement.
it looks like yo d***!!