#Increase percentages

54 messages · Page 1 of 1 (latest)

alpine plank
#

28% increase every year could be written as 1,28

#

so after 1 year he will have 800 times 1,28 debt

#

@wintry vale

#

how much will he have after two years?

wintry vale
#

800 × 128 ??

alpine plank
#

he has 800 pounds

#

it increases by 28% every year

#

which means

#

in one year

#

it has increased to

#

800 times 1,28

terse plover
#

How 1.28?

alpine plank
#

so now the debt after one year is (800 x 1,28)

alpine plank
terse plover
#

28% isn't 1,28

alpine plank
#

1 is the same as 100%

terse plover
#

Is it because it's every year?

alpine plank
#

0,28 is the same as 28%

terse plover
#

Yeah

alpine plank
#

because it is an increase

#

its 1,28

#

if it is a decrease

#

by 28 %

#

you multiply by (1 - 0,28) instead

#

going back to the original question

#

so after one year

#

he has

#

800 x 1,28 in debt

#

what does he have after two years?

#

(800 x 1,28) x 1,28

#

so after 14 years

#

he will owe

#

800 x 1,28 x 1,28 ..... x 1,28

#

14 times

#

or

#

800 x (1,28)^14

#

(to the power of 14)

terse plover
#

25,353?

alpine plank
#

yes

#

about the , idk if you wrote 25 or 25 thousand

#

25 thousand 353

wintry vale
#

So its 25,353 ??

alpine plank
#

idk what nearest 1 p is

#

is p pound?

#

i dont have the same money

#

or is nearest 1 p penny?

wintry vale
#

1p is a decimal I hink

alpine plank
#

the total is

#

25353,012

#

so 25353 and 1 penny

#

25353,01

#

final answer ^^

wintry vale
#

£25353.01 ?

alpine plank
#

yes