What is the final amount if 1584 is decreased by 18% followed by a 19% increase?
Give your answer rounded to 2 DP.

Step-by-step explanation:

step 1

if 1,584 is decreased by 18%

we know that

Multiply the number by 0.82

step 2

The number 1,298.88 is increased by a 19%

we know that

Multiply the number by 1.19

see explanation

step-by-step explanation:

since the sequence is geometric there is a common ratio r between consecutive terms, that is

r = 4 ÷ - 2 = - 2

r = - 8 ÷ 4 = - 2

r = 16 ÷ 8 = - 2

the next term - 13 must be incorrect as it should be - 32 for the sequence to be geometric.

the first 4 terms are therefore geometric with common ratio r = - 2