In order to calculate 25% of 30 let's write it as fractional equation.
We he 30 = 100% and X = 25%. So our fraction will look like:
30/X=100%/25%Now we can solve our fraction by writing it as an equation:
X = (30 脳 25) 梅 100
=X = 750 梅 100
=X = 7.5
Therefore, 25% of 30 is 7.5
Another way to solve our problem is to find the value of 1% of the number and then multiply it by the number of percent (25). To find 1% of a number 30 you need to divide it by 100:
X = (30 梅 100) 脳 25
=X = 0.3 脳 25
=X = 7.5
So we got the same result again: 7.5