Math's Percentages %

Math's Percentages %

1. Find 20% of £60

   • 20 _ 100
     • 20/100
   • X
     • X
   • 60
     • 60
     • = £12

2. Percent means out of 100

   • so 20% means "20 out of 100"
     • 20/100
     • =
     • 20 _ 100

3. Fraction

   • 1/4
     • 1/2
       • 3/4

4. Decimals

   • 0.25
     • 0.50
       • 0.75

5. Percentage

   • 25%
     • 50%
       • 75%

6. Converting

   • 1 _ 5
   • (1/5)
   • =
   • 0.2
   • X100
   • =
   • 20%

7. 1 _ 8

   • (1/8)
     • =
       • 0.125
         • 0.125
           • X100
             • =
               • 12.5%

8. Question

   • A plumber bill for fixing a small leak is £98 + vat.
     • The vat is changed at 17.5%
       • Find 17.5% of £98 using standard method
         • 1) 17.5% of £98
           • 2) 17.5 _ 100
             • X 98
               • 3) 17.5/100 X 98 = 17.15 = £17.15
                 • This £17.15 is vat which then is added to the £98 to get the final bill
                   • £98 + £17.15 = £115.15

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