{"ad_unit_id":"App_Resource_Canonical","width":300,"height":250,"rtype":"mind_map","rmode":"view","sizes":"[[[0, 0], [[300, 250]]]]","custom":[{"key":"env","value":"production"},{"key":"rtype","value":"mind_map"},{"key":"rmode","value":"view"},{"key":"uauth","value":"f"},{"key":"ulang","value":"en_us"}]}

Repeated Percentage

1 When a quantity is
increasing or decreasing
over a period of time, we
usually use multipliers to
work out the percentage
change.

2 Example:

2.1 A boat was bought for £13700. During the first year, it
depreciated (decreased) in value by 15%, the second
year by 10% and the third year by 8%. Work out the
value of the boat at the end of the third year.

2.1.1 A decrease of 15% is a multiplier of 0.85
A decrease of 10% is a multiplier of 0.9
A decrease of 8% is a multiplier of 0.92

2.1.1.1 The value of the boat is 13700 x 0.85 x 0.9 x 0.92

2.1.1.1.1 =£9642.06