maths

Everyone should be able to find 10% of an amount easily, because there is a place value trick to it.

If you are finding harder percentages, there is a formula to use (calculator allowed!)

Finding 10% in your head. Pick up the decimal place and move it one spot to the left -

E.g. $45.00 - move the decimal - $4.50 -- so 10% of $45 is $4.50

Finding 10% in your head
	10% of that number
$150.00	15
$65.00	6.5
$75.00	7.5
$90.00	9
$140	14
$120	12
$125	12.5
$199.99	19.999
$250	25
$49.99	4.999
$1,500	150
$4,950	495

Finding percentages - USE A CALCULATOR FOR THESE. 

Amount / total x 100 = 

E.g. 20/35 x 100 = 57%

	= Percentage
14/20	57
3/15	20
60/80	75
45/50	90
87/90	96
14/30	46
65/80	81
17/35	48
19/25	76
17/20	85
16/27	59
26/29	89
15/28	53
13/29	44
19/32	59
27/46	56
19/70	27
3/45	6
18/95	18
14/65	21