    #### Find the percentage increase

 (a)   the increase amount is 700 − 500 = 200
 (b)   the percentage as a fraction is 200/500 = 2/5
 (c)   100 ÷ 5 = 20 (where 5 is the demoninator of the fraction)
 (d)   2/5 × 20/20 = 40/100 = 40%
 So 40% increase in price

#### Find the percentage increase

 (a)   the increase amount is 564 − 470 = 94
 (b)   the percentage as a fraction is 94/470 = 1/5
 (c)   100 ÷ 5 = 20 (where 5 is the demoninator of the fraction)
 (d)   1/5 × 20/20 = 20/100 = 20%
 So 20% increase in price

#### Find the percentage decrease

 (a)   the decrease amount is 50 − 40 = 10
 (b)   the percentage as a fraction is 10/50 = 1/5
 (c)   100 ÷ 5 = 20 (where 5 is the demoninator of the fraction)
 (d)   1/5 × 20/20 = 20/100 = 20%
 So 20% decrease in value.

#### Find the percentage decrease

 (a)   the decrease amount is 1100 − 990 = 110
 (b)   the percentage as a fraction is 110/1100 = 1/10
 (c)   100 ÷ 10 = 10 (where 10 is the demoninator of the fraction)
 (d)   1/10 × 10/10 = 10/100 = 10%
 So 10% decrease in value. back to:   