Percentages.

0.1 and 1/10

Turn the percentage into a fraction and a decimal 10%

1 and 1

Turn the percentage into a fraction and a decimal 100%

0.2 and 1/5

Turn the percentage into a fraction and a decimal 20%

0.3 and 3/10

Turn the percentage into a fraction and a decimal 30%

0.6 and 6/10 or 3/5

Turn the percentage into a fraction and a decimal 60%

0.7 and 7/10

Turn the percentage into a fraction and a decimal 70%

0.8 and 8/10 or 4/5

Turn the percentage into a fraction and a decimal 80%

0.9 and 9/10

Turn the percentage into a fraction and a decimal 90%

(Let b be the amount) 107%=$1049.67 1%=$9.81 ($1049.67 ÷ 1.07) 100%=$981.00 ($9.81 x 100) WHEN ADDING ADD THE PERCENTAGE TO 100%

When finding an original price of something that has been added to the price we add the percentage to 100%, eg. 100% + 7% = 107% Example question: After receving a 7% pay rise, Derek now earns $1049.67. What was his original wage?

(Let b be the amount) 0.91 x b = $213.85 b=$235 WHEN DISCOUNTING ADD 1

When finding an original price of something that has been discounted we add a 1 to the percentage, eg. 90%= 0.91 Example question: After a 9% discount, Adam paid $213.85 for a bike. what was the original price?

Use the s<>d button.

When turning a percentage into a decimal or fraction. Or a fraction into a decimal or percentage. ect

The selling price is the price the item is sold for.

Selling price

0.4 and 4/10 or 2/5

Turn the percentage into a fraction and a decimal 40%

0.5 and 1/2

Turn the percentage into a fraction and a decimal 50%

When using a calculator write this into it. 18/100x 750 (always put the number of the percentage over 100 and the percentage sign means 100 (%)) =135mL

Find 18% of 750mL

To work this we have to remember that "of" mean to x (times) working out: 50% x (of) 250 = 50/100 x $250 = 1/2 x $250 (simplifyed) = $150

Find 50% of $250

Before increasing the amount we must find out what 7% of $200 is. =7/100 x $200 =$14 $200 + $14 = $214

INCREASE $200 by 7%

=15/100 x 800mL =120mL =800mL + 120mL = 920mL =920mL

Increase 800mL by 15%

A mental strategy TIP: simplify the percentage 40%=4/10=2/5 Find 1/5 (20%) of 750mL =150mL =150mL x 2 =300mL

NO CALCULATOR Find 40% of 750mL

(let b be the amount) 0.15 x b = $27.90 ÷0.15 ÷0.15 b=$186

The unitary method 1 15% is $27.90

The first step when using the method is: (let b be the amount) 1. turn the fraction into a decimal 15% into 0.15 2. make an equation 0.15 x b = $75 ÷0.15 ÷0.15 b=$500

The unitary method 1 (algebra) 15% of an amount is $75 what is the amount?

The first step when using the method is we must divid 75 by 15. For example what ever number divied by the percentage. %1= (75÷15)=5 After that times (x) the result by 100. 100%=500

The unitary method 2 15% of an amount is $75 what is the amount?

1%=(145.50÷27)=5.39 100%=$538

The unitary method 2 27% of an amount is $145.50 what is the amount?

5%

Turn the decimal into a percentage 0.05

10%

Turn the decimal into a percentage 0.10

87%

Turn the decimal into a percentage 0.87

13%

Turn the fraction into a percentage 13/100

30%

Turn the fraction into a percentage 3/10

35%

Turn the fraction into a percentage 7/20

0 and 0

Turn the percentage into a fraction and a decimal 0%

Cost price= $240 Selling price= $180 1. To figure out the percentage the first thing we need to do is find the profit/loss. = $60 = Loss 2. To write the profit/loss as a percentage we put the profit/loss over the cost price. = 60/240 = 1/4 = 25% Answer = 25%

A girl brought a bike for $240 and then sold for $180. Please write the profit/loss in a percentage.

=36/100 x 550mL =198mL =550mL - 198mL = 352mL =352mL

Decrease 550mL by 36%

=15/100 x $250 =$37.50

Find 15% of $250 (try to use the strategy you just learnt)

The cost price is the price the item is brought for,

Cost price

Before increasing the amount we must find out what 12% of $150 is. =12/100 x $150 =$18 =$132

DECREASE $150 by 12%