Articles of percentages

How to solve the given problem of simple interest?

The problem statement is: What annual instalment will discharge a debt of 1092 due in 3 years at 12% simple interest? Now, what I know is Simple interest =( principal* Rate per annum*Time in years)/(100) Here, R= 12℅ ,T=3 years but I don’t understand how to move forward.I am not getting the meaning of the […]

What does “X% faster” mean?

I was reading something today that was talking in terms of 10%, 100% and 1000% faster. I assumed that 10% faster means it takes 10% less time (60 seconds down to 54 seconds). If that is correct wouldn’t 100% faster mean 0 time and 1000% mean traveling back in time?

1/1000 chance of a reaction. If you do the action 1000 times, whats the new chance the reaction occurs?

A hypothetical example: You have a 1/1000 chance of being hit by a bus when crossing the street. However, if you perform the action of crossing the street 1000 times, then your chance of being hit by a bus increases to about 60% because every time you do the action, the probability of it happening […]

how to calculate what I need for final exam

Evaluation: A final mark out of 100 will be calculated as follows: Clicker Questions: 5% WeBWorK Assignments: 10% Midterm Tests (25% of the higher mark + 10% of the lower): 35% Test 1 – Saturday, February 7, 10:30-11:50 a.m. Test 2 – Friday, March 13, 6:00-7:20 p.m. Final Examination (2.5 hours – date and time […]

Rounding Percentages

Okay so I have been having a problem and would really appreciate any help. I have posted a table below with the aim of making this as simple/precise as possible. Value % Rounded % Direction 10 1.515151515151520% 2% Up 20 3.030303030303030% 3% Down 30 4.545454545454550% 5% Up 40 6.060606060606060% 6% Down 50 7.575757575757580% 8% Up […]

Why does $0.75 \times 1.25$ equal $0.93$ and not $1$?

If percentage points can equal decimal points, then $1.25$ should equal $125$% when multiplying $1.25$ by any number. Therefore $125$% of $0.75$ should equal $1$ if $0.75$ is also $75$% of $1$. Am I missing something super obvious here or what?! Please help. Thank you!

Finding total after percentage has been used?

Tried my best with the title. Ok, earlier while I was on break from work (I have low level math, and want to be more fond of mathematics) I work retail, and 20% of taxes are taken out, and I am wanting to find out how much I made before 20% is taken out. So […]

Alligation or mixture

A vessel is filled with liquid,3 parts of which are water and 5 parts syrup.How much of the mixture must be drawn off and replaced with water so that the mixture may be half water and half syrup? What is the best possible way to solve this question?