How do you work out this numeracy question?

A Year 10 English essay was due to be submitted on 17th July, with a late submission penalty of 4% per day.

The English teacher gave Daisy's essay a mark of 87%. However the essay was handed in 5 days late.

What will Daisy's final mark be for her essay? Give the mark as a whole percentage.

Daisy's mark = %

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purplepen · 51-55, F

87 because the teacher already gave her that mark.

NewKidInTown · 51-55, M

70.9%

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summerlove · 31-35, F

@NewKidInTown No I'm just doing online practice quizzes. I do have an exam next month but I'm just trying to prepare for it and practice as much as I can because I need it haha and I find it's good asking for help on here since people explain it really well and help me.

NewKidInTown · 51-55, M

@summerlove I just did it again and I still got an answer closer to 71 than 70. I must be doing something wrong.
Best of luck!

summerlove · 31-35, F

@NewKidInTown Thanks!

FormerPadresfan · 26-30, M

.04x5= .20
.87-.2= .67
67%

summerlove · 31-35, F

@FormerPadresfan I'm doing online practice quizzes and the answer said 70%. I'm so lost.

FormerPadresfan · 26-30, M

@summerlove Maybe...
1-.04= .96
.87x.96x.96x.96x.96x.96

Try entering that second part into a calculator

summerlove · 31-35, F

@FormerPadresfan Yes you are correct. I don't know how you worked it out though haha.

ButterFly2023 · 18-21, M

I'm shit at arithmetic.

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