Work out the percentage change when a price of £40 is decreased to £38

5%

Step-by-step explanation:

38/40 = x/100

38*100 = 3800

3800/40 = 95

95/100 = 38/40

38 is 95% of 40 therefore the change is 5%

x= cost per bracelet

number of bracelets * x + shipping charge = total cost

so

9x+9=72

jbankston is right, use thhe link and you should find the answer.