Åk 6–9

2.2 Portions as Percent, and Percent of Quantities and Value

Portions as percent
By using percent you can express parts of a whole, the portion.

Here you see three different chocolate bars where the different sizes are shaded in. One part of the whole chocolate bar is shaded in.

 Part that is shaded in Picture Percent Half = 10/20 = 1/2 1/2 = 50 % A fourth = 5/20 = 1/4 1/4 = 25 % A tenth = 2/20 = 1/10 1/10 = 10 %

50 % can also be expressed in different fractions.  It is still half of the whole. Foto: Fredrik       Enander 1/2 = 50 %
8 squares of 16 = 8/16 = 1/2 = 50 %

Percent of a quantity
In percent, you can express parts of a quantity.

Here you see pictures of hears. Some of the hearts are red, in other words a part of the quantity.  Half = 10/20 = 1/2 50 % are red. A fourth = 5/20 = 1/4 25 % are red. One tenth = 2/20 = 1/10 10 % are red.

Percent of a value
 Percent can also be part of a value.  ”Middle milk” contains 1.5 % fat, Skim milk contains 0.5 % fat and Standard milk contains 3 % fat. Foto: Fredrik Enander