ABACUS – PERCENTAGE
a) By percentage, we mean the hundredths. For example 56% means 56 out of 100. The
notation “%” is used for percentage.
b) The percentage can be represented in forms of fractions and decimals.
Eg. : 25% can be denoted by the fraction 10025 = 41. It can also be given as
100(^25) = 0.25.
c) For finding the percentage value, you can use either the fraction procedures or the
decimal procedures.
d) Finding the percentage value through decimal procedures :
Example : 35% of 567
- Convert the percentage into a decimal. The value will be 0.35.
- Now, set the 35 in the left extreme of the abacus. Now, the problem should be
treated as 35×567. - The normal procedures used for the multiplication of whole numbers should be
followed at this stage.
e) Multiply the numbers and you will get the value as 19845.
- Since the number 35 has two decimal places, put the decimal point before the last
two places at the right side of the number 19845. The answer is 198.45.
Example : 42.7% of 789.
i) Convert the percentage into a decimal. The value will be 0.427. Note that you
have already one decimal in the given percentage value itself.