Question

What percentage should be added to 40 to make it 50?
explain in steps please.​

Answer 1

Answer:

Let (x/100)(40) = what percentage

Write an equation and solve.

( x/100 )(40) + 40 = 50

40x/100 + 40 = 50

(2/5)x + 40 = 50

(2/5)x = 10

x = (5/2)(10)

x = 25% ANSWER

Check: (25/100)(40) + 40 = 50 ?

(.25)(40) + 40 = 50 ?

10 + 40 = 50 TRUE so It checks

HOPE HELPFUL!!

Answer 2

25% should be added to 40 to make it 50

Given : The initial number is 40 and the final number is 50

To find : The percentage of the initial number that should be added to the initial number itself, to produce the final number.

Solution :

We can simply solve this mathematical problem by using the following mathematical process. (our goal is to calculate the required percentage)

Let, the required percentage = x%

So, x% of 40 :

= 40 × x%

= 40 × x/100

= 2x/5

Final number :

= Initial number + x% of initial number

= 40 + (2x/5)

According to the data mentioned in the question,

40 + (2x/5) = 50

2x/5 = 50-40

2x/5 = 10

2x = 10 × 5

2x = 50

x = 50/2

x = 25

The required percentage = x% = 25%

Hence, 25% should be added to 40 to make it 50