Which calculation could not be used to find the percentage change between 16 and 20?

look at the image attached and explain why

Option (B).

Step-by-step explanation:

Percentage change between two numbers a and b can be calculated by the formula,

% change =

Where, (b - a) = Change in values

a = Initial value

If a = 16 and b = 20

Percentage change between 16 and 20 will be,

=

=

= 25%

If a = 20 and b = 16,

Percentage change =

                                 = 20%

Therefore, %change between 16 and 24 may be 16% or 20%.

Option (A),

= 25%

Option (B),

= 1.25 - 1 × 100

                   = 1.25 - 100

                   = -98.75%

Option (C),

= 25%

Option (D),

= 20%

Therefore, we can not use the calculation used in Option (B).