Percentages
- A percentage is a fraction with 100 as the denominator
- It is represented by the symbol %
Eg: 15/100 is 15%
The percentage of increase or decrease
Percentage increase = (Amount increase / Original value) x 100%
Percentage decrease = (Amount decrease / Original value) x 100%
Eg:
a) Find the decrease percentage when RM250 is decreased by RM55
Amount decrease = RM55
Percentage decrease = (RM55 / RM250) x 100% = 22%
b) In February, Aiman sold 560 durians. In March, the number of durians that he sold increased by 15%. How many durians did he sell in March?
Amount increase = Percentage increase x Original value
Amount increase = 15% x 560 = (15/100) x 560 = 84
New value = Original value + Amount increase
New value = 560 + 84 = 644
In March, he sold 644 durians.
The percentage of increase or decrease
Percentage increase = (Amount increase / Original value) x 100%
Percentage decrease = (Amount decrease / Original value) x 100%
Eg:
a) Find the decrease percentage when RM250 is decreased by RM55
Amount decrease = RM55
Percentage decrease = (RM55 / RM250) x 100% = 22%
b) In February, Aiman sold 560 durians. In March, the number of durians that he sold increased by 15%. How many durians did he sell in March?
Amount increase = Percentage increase x Original value
Amount increase = 15% x 560 = (15/100) x 560 = 84
New value = Original value + Amount increase
New value = 560 + 84 = 644
In March, he sold 644 durians.
