Percentage
Calculate 10% of $30
10/100 * 30 = $3
write 30km per hour and $4 per kg as a rate
30km/h
$4/kg
how many fortnights are there in one year
26
Round 3.356 to 1 decimal place
3.4
Write down the simple and compound Interest Formulas.
I = pin
A = P(1 + i)^n
Increase $40 by 5%
5/100*40 - $2
40+2 = $42
write as a rate and then simplify
300km travelled in 10 hours
30 km/ h
Sarah's annual salary is $67 890. Calculate her weekly income.
67 890/ 52 = $ 1305.58
convert 0.00000067 to scientific notation
6.7x10^-7
Calcualt ethe interest earned on $2000 invested for 4 year at 5% p.a. simple interest
I = 2000*5/100*4 = $400
Determine what percentage of 30 is 50
30/50 * 100 = 60%
$45/ 300 grams
$15/100 grams
Ken makes $1700.96 per week. If he works 38 hours in a week, calculate is hourly rate.
1700.96/38 = $44.76
Round 0.000568 to 2 significant figure
0.00057
Calculate the total amount in a savings account at the end of 10 years if $400 is invested at 6% per annum compound interest compounded annually.
A = 400(1 + 0.06/1)^10*1 = $716.34
Determine 300 grams as a percentage of 5.2 kg. Round your answer to 1 decimal place.
300/5200 * 100 = 57.7%
simplify the rate to the nearest 100mL
$14 / 4.2L
$14 / 4200
$0.33/ 100 mL
Dan works 5 hours at his normal rate of $22.50 per hour and 6 hours at time and a half. Calculate his total income for the time worked.
22.50*5 + 22.50*6*1.5 = $315
which is larger 235 678 or 2.4x10^5
2.4x10^5 = 240 000
which is greater than 235 678
Bacteria grows exponentially. Use the compound interest formula to calculate the total amount of bacteria after 7 years if 10 000 bacteria increase at a rate of 12% per annum.
A = 10 000(1+ 0.12/1)^7*1 = 26 600 bacteria
A $700 TV is put on sale for $435. Calculate the percentage loss. Round your answer to 1 decimal place.
(700-435)/700*100 = 37.9%
which is the better buy
6 hats for $50
8 hats for $75
$50 / 6 hats
$8.33 / hat
$75/ 8 hats
$9.38 / hat
Karen is paid a retainer of $400 and a comission of 2% of $3400 worth of sales. Calculate her income.
income = retainer + comission
= 400 + 2/100 * 3400
= $468
calculate 2x10^-3 x 2x10^-4
2x10^-7
calcualte the weekly repayments of a $1200 loan taken out for 3 years at 6% per annum simple interest.
I = 1200*6/100*3 = $216
A = 1200 + 216 = $1426
Repayments = 1426/52*3 = $9.08