A bookstore had 90 copies of a magazine. Yesterday, it sold 1/3 of them. Today,
it sold 3/5 of what remained. How many copies does the bookstore have left?
90 - 30 = 60
2/5 * 60 = 24
To find out how many copies the bookstore has left, we can follow these steps:
Step 1: Calculate the number of copies sold yesterday.
Yesterday, the bookstore sold 1/3 of the 90 copies, which is (1/3) * 90 = 30 copies.
Step 2: Calculate the number of copies remaining after yesterday's sales.
The number of copies remaining after yesterday's sales is 90 - 30 = 60 copies.
Step 3: Calculate the number of copies sold today.
Today, the bookstore sold 3/5 of the remaining 60 copies, which is (3/5) * 60 = 36 copies.
Step 4: Calculate the number of copies the bookstore has left.
The number of copies the bookstore has left is 60 - 36 = 24 copies.
Therefore, the bookstore has 24 copies left.
To find out how many copies of the magazine the bookstore has left, we need to subtract the number of copies sold from the initial total.
1. Yesterday, the bookstore sold 1/3 of the total copies, which can be calculated by multiplying the total number of copies by 1/3:
Sold yesterday = (1/3) * 90 = 30
2. Now we need to calculate the number of copies remaining after yesterday's sales:
Copies remaining = Total copies - Sold yesterday = 90 - 30 = 60
3. Today, the bookstore sold 3/5 of the remaining copies, which can be calculated by multiplying the remaining copies by 3/5:
Sold today = (3/5) * 60 = 36
4. To find out how many copies the bookstore has left, we subtract today's sales from the number of copies remaining from yesterday:
Copies left = Copies remaining - Sold today = 60 - 36 = 24
Therefore, the bookstore has 24 copies of the magazine left.