Sara H. answered 05/24/17
Tutor
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Science and All Levels of Math Tutor
Sale price = regular price x (100-% discount)/100
Using the above formula will make this question very easy for you.
1st store
Sale price = $450 x (100-30%)/100 = $315
2nd store
Sale price = $390 x (100-20%)/100 = $312
From this, you can conclude that the 2nd store will have a lower price for the same speakers!