Answer:
See below.
Step-by-step explanation:
To calculate a percentage divide by the part by the whole, You will get a decimal. The decimal becomes a percentage after you multiply by 100. This moves the decimal place two places to the right. So 0.10 becomes 10%.
1. 20 is 50% of 40 since 20/40 = 0.5
2. 8/ 32 = 0.25 so it is 25%
3. 2/40 = 1/20 = 0.05 so it is 5%
4. 100/25 = 4 so it is 400%
5. 3/ 2 = 1.5 so 150%
To find a percentage of a number, multiply the number by the decimal conversion of the percent.
6. 0.15(300) = 45
7. 33/75 = 0.44 so it is 44%
8. 12/18 = 2/3 = 0.66 so it is 66%
9. 0.35(1000) = 350
10. 40 is 20% of what can be solved by remembering that 20* 5 = 100%. So 5*40 = 200. The number is 200.
Answer:
<em>24 children</em>
Step-by-step explanation:
If the length of time, y hours, it takes to put a jigsaw puzzle together is inversely proportional to the number of children, x, this is represented as;
k is the constant of proportionality
If it takes 16 children 6 hours to put the jigsaw puzzle together, this means at x = 16, y = 6
Substitute:
6 = k/16
k = 6*16
k = 96
W are to find number of children needed to put the same jigsaw puzzle together in 4 hours, this is done by substituting k = 96 and y = 4 into the expression y = k/x
y = 96/4
y = 24
<em>Hence it will take 24 children to put the same jigsaw puzzle together in 4 hours</em>
<em></em>
The answer is negatif 24/7
Subtract AB (x+6) from AC (5x-6) to obtain BC
BC should be equal to 4x-12
We are given the statement:
She gets a base pay of $80 a day plus 5 percent of the
value of any merchandise she sells that exceeds a total of $400
Then we are given the equation:
Earnings = 400 + 0.05 (t – 80)
Now if we read the statement carefully, we can understand
that the base pay is $80 and NOT $400. Therefore it should be the constant
value in the equation. Now the statement also tells that what will be added to
her pay is anything beyond 400, therefore it should be the one inside the
parenthesis. That is:
<span>Earnings = 80 + 0.05 (t – 400) ---> correct equation</span>
Now we use the corrected equation to solve for the earnings
when t = 475
Earnings = 80 + 0.05 (475 – 400)
<span>Earnings = 83.75 dollars</span>