General Percentages Skills and Challenges
Write 17 out of 25 as a percentage
68%
Increase 40 by 20%
48
Sally's regular hourly rate is $16.50 per hour.
She earns time and a half for Sunday shifts.
What is her Sunday rate of pay?
$24.75 / hour
Fred invests $4500 for 7 years at a simple interest rate of 6.2% p.a.
How much interest does he earn?
$1953
Decrease 180 by 60%
72
Find 65% of 250
162.5
The calculation 300 x 0.82 will mean that 300 is reduced by what percentage?
18%
Based on the current Australian tax brackets (2026-27), someone who earns $80 000 per annum is in which tax bracket?
Tax Bracket 3
$382.73 (382.725)
Simon bought a car for $14 000 and sold it a few years later for $9 500. What percentage loss did he make on the sale (round to two decimal places)?
32.14% loss
48% of a value is 1200. What is the original value?
2500
On Monday, the temperature was 20 degrees. On Tuesday it was up to 27 degrees. By what percentage did the temperature increase?
35%
Naomi earns $24.00 per hour, and time and a half on weekends.
Last week she worked 9 regular hours during the week and 4 hours on the weekend. What was her weekly earnings?
$360
$25 000 is invested at a compound interest rate of 6.1% p.a, compounding annually, for four years.
After three years, the value of the investment is:
$31 681.19
Tony puts $4500 in the bank, earning a simple interest rate of 3.8% p.a.
What is the minimum amount of time he should invest for to earn $900 in interest?
5.26 years.
What's the best value for soft drink?
375mL can for $1.50
1.25L bottle for $4.75
2L bottle for $8.10
1.25L bottle
The price of petrol goes by up by 20%, and is now $2.76 per litre. What was it previously?
$2.30 per litre
Germaine earns commission on sales she makes. Her flat salary is $3200 per month, plus 16% of sales made. Last month she sold $12 500 worth of product. What did she earn in the month?
$5200
Tim borrows $80 000 for a new caravan. Compound interest on the loan is charged at a rate of 7.2% p.a, compounding monthly.
After 5 years, Tim has not made any repayments. The amount he owes the bank is
$114 543.07
The compound interest formula uses a value of n for 'compounding period' and r for 'rate per compounding period'.
In a situation where $12 000 is invested for 3 years at a compound rate of 6% p.a compounding quarterly, what will the values of n and r be?
n = 12 (12 compounding periods)
r = 1.5 (6% per annum means 1.5% per quarter)
Naomi borrows $24 000 to buy a car, at a simple interest rate of 4.7% p.a.
She plans to repay the loan in monthly instalments over 6 years.
What amount will her repayments be? (Don't forget that the repayment needs to cover the loan amount plus the interest)
$427.33
The population of a sporting club increased by 20%. The next season, it increases by another 30%. The club now has 234 members.
How many members did the club have at the start?
150.
$40,270
$60 000 is borrowed at a compound interest rate of 5.2% p.a., compounding semi annually.
The loan is to be repaid semi-annually, over a period of 10 years.
The amount of each repayment will be
$5012.66
No computers allowed for this question - it's your best estimate.
To the nearest %, what percentage of Australia's population lives in Victoria? (latest data from the ABS)
26%