20% = 0.20
multiply original price ( $0) by 0.20 for the amount of discount then subtract it
80*0.20 = 16.00
she will save $16
80-16 = 64
she will pay $64 after the discount
When you divide by a multiple of 10 or when you multiply by a multiple of 10.
No, a Repeating Decimal could be .777 ... Or it could also be something Like .657657657
The decimal you presented is not a form of a repeating decimal.
Since these events are independent, you add the possibilities
the number of cards less than 9 is 32
the number of spades is 13
there are 52 cards in a deck, so you put those numbers over 52
32/52 + 13/52 = 45/52
the answer is 45/52
