When a number is decreased by 30%of itself, the result is 28. What is the number?
100percent - 30percent=70 percent
so
70/28 is proportional to 100/x
70x=2800
x=40
Well, it seems like this number needs a little bit of math therapy! Let's help it out.
Let's call this mysterious number "x". When it is decreased by 30% of itself, we can express it as:
x - 0.3x = 28
Simplifying that expression, we have:
0.7x = 28
To unleash x from that pesky 0.7, we'll have to divide both sides of the equation by 0.7:
x = 40
So, the number in question is 40!
Let's call the number "x".
According to the problem, when a number is decreased by 30% of itself, the result is 28.
This can be written as an equation:
x - 0.3x = 28
Simplifying the equation, we have:
0.7x = 28
To solve for x, we divide both sides of the equation by 0.7:
x = 28 / 0.7
Evaluating this expression, we find:
x = 40
Therefore, the number is 40.
To solve this problem, we need to set up an equation to represent the given situation. Let's call the unknown number "x."
According to the problem, when a number is decreased by 30% of itself, the result is 28. Mathematically, this can be written as:
x - (30% * x) = 28
To find the number, we need to solve this equation:
x - (0.30x) = 28
To simplify the equation, we can combine the x terms:
0.70x = 28
Now, we can isolate x by dividing both sides of the equation by 0.70:
x = 28 / 0.70
Evaluating the expression on the right side of the equation:
x = 40
Therefore, the number is 40.