The uppercase delta Δ means "change in" so for example: Δx = difference between two x values.
The lowercase delta which Brainly does not have, looks like a squiggly lowercase d. It generally means "very small change in".
Answer:
80%
Step-by-step explanation:
First you subtract the 8 from 40 which leaves you with 32
Then you set up your proportion 32/40 = x/100
Cross multiply and divide which leaves you with 80
Let the number of pants have to be made be x.
So,
9.55 * x = 525.00
x =

≈ 54.97
Thus, the number of pants have to be made are 54.