Question

find the value of 0.75%of 40kg

Answer 1

To get the solution, we are looking for, we need to point out what we know. 

1. We assume, that the number 40 is 100% - because it's the output value of the task. 
2. We assume, that x is the value we are looking for. 
3. If 40 is 100%, so we can write it down as 40=100%. 
4. We know, that x is 0.75% of the output value, so we can write it down as x=0.75%. 
5. Now we have two simple equations:
1) 40=100%
2) x=0.75%
where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:
40/x=100%/0.75%
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for what is 0.75% of 40

40/x=100/0.75
(40/x)*x=(100/0.75)*x       - we multiply both sides of the equation by x
40=133.333333333*x       - we divide both sides of the equation by (133.333333333) to get x
40/133.333333333=x 
0.3=x 
x=0.3

now we have: 
0.75% of 40=0.3

Answer 2

Answer:

0.3

Step-by-step explanation:  

                 

Simplify  0.75% of 40 kg , for percentage we go for 1/100

steps:  

• 40 *0.75* (1/100) (cancel both zero from 40 and 100).
• we get 4*0.75(1/10)

• For 0.75/10( in this case for dividing purpose 0 implies as 0.075 in case 00 (100) it came as 0.0075)
• were as 0.075*4=0.3