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Can you help me with number six and seven please I don't get it and I need to be explained in Word for Word thank you if you can

Can you help me with number six and seven please I dont get it and I need to be explained in Word for Word thank you if you can class=

Respuesta :

apologiabiology
6.
original=100%
75% off means
100%-75%=25%
remaining is 25%
it was sold for 45
therfor
25%=45
find 100%
just multipl it by 4 since 25 times 4=100
100%=45 times 4=180
originl price=180
answer is A


7. simle interest
I=PRT
P=principal=1000
I=interest=300
T=time=5
R=rate in percent form=?

300=1000*?*5
300=5000?
divide both sides by 5000
0.06=?
aka
6%

answer is 6%

b is answer


6. A
7. B