70%=70/100=7/10
what you do is shade 7 of the squares and say that is 21
now each square is worth the same
so 21/7=3
each square is worth 3
10 squares
3 times 10 is 30
the number is 30
see diagram
Answer:
7
Step-by-step explanation:
<u>Concepts:</u>
- Division: a system of distributing a collection of things into equal parts
- Fractions: #s that represent a part of a whole
- Dividing Fractions: dividing a fraction by another fraction = multiplying the fraction by the inverse (reciprocal) of the other one
- Inverse Operations: operations that are opposite of each other (e.g. inverse of addition is subtraction)
<u>Solving:</u>
1. First, let's set up the equation:
7/8 ÷ 1/8
2. We can get the reciprocal of 1/8 by doing the opposite of division; multiplication. 1/8 becomes 1 · 8, and that's equal to 8.
3. Now, since we know dividing a fraction by another one is exactly the same as multiplying the fraction by the reciprocal of the other, let's multiply 7/8 by the inverse of 1/8, which is 8.
7/8 · 8 = 56/8 = 7
Therefore, 7/8 divided by 1/8 is equal to <u>7</u>.
y: original price (in dollars)
0.12y: amount of discount (in dollars)
sale price: y - 0.12y = 0.88y
sales tax on this sale price: (0.06)(0.88y)
final cost: 0.88y + (0.06)(0.88y) = 0.88y(1+0.06) = 0.9328y
Answer:
0.67
Step-by-step explanation:
Hi there! So there were $2,000 in sales on Monday, and then it dropped by 10% on Tuesday. As you probably know, percents are parts of 100. Even though the sales dropped by 1%, it is still 90% of Monday's sales, because 100 - 10 is 90. 2,000 * 90% (0.9) is 1,800. $1,800 in sales were made on Tuesday. On Wednesday, sales fell another 20%, which leaves 80% of Tuesday's amount still made. 1,800 * 80% (0.8) is 1,440. $1,440 of sales were made on Wednesday. Now, the amount of Thursday's sales increased by 25% of Monday's sales. We can multiply Monday's sales (2,000) by 25% to find what amount that is. 2,000 * 25% (0.25) is 500. Now, we add that to Wednesday's amount to find Thursday's amount. 1,440 + 500 is 1,940. We can find the net change by finding the difference. Net change can be positive or negative. In this case, 2,000 - 1,940 is 60. Sales dropped overall from Monday to Thursday, so the net change will be negative. There. The net change in total sales is -$60.
