Practice Percent as Ratio in Math
Use these practice problems to test your method after reviewing the concept explanation and worked examples.
Quick Recap
A ratio comparing a quantity to 100, written with the % symbol; 'per cent' literally means 'per hundred'.
'Per cent' means 'per hundred'—25\% means 25 out of every 100.
Example 1
easyA shirt originally costs \45. It is on sale for 20\%$ off. Find the sale price.
Example 2
mediumA student scores 34 out of 40 on a test. Express this as a percentage. Then determine what score out of 40 corresponds to 90\%.
Example 3
easyConvert each to the indicated form: (a) 0.045 to percent, (b) 130\% to decimal, (c) \dfrac{3}{8} to percent.
Example 4
mediumA population grew from 8{,}000 to 9{,}400. What is the percent increase?