One percent times thirty is 0.3
One and thirty five hundredths of one percent.
Thirty seven point five percent Thirty seven and one half percent
Thirty percent of one hundred is 30, so thirty percent of five hundred must be 30 X 5 = 150.
thirty two point one percent
0.25% to 0.30% carbon in mild steel. Roughly one quarter to one thrid of one percent.