Question

A screwdriver cost $99, if you save $79 what is the percent of change?

Answer 1

To calculate the percentage of change We:
⇒work out the difference of the two costs
$99-$79=$20
⇒Divide the difference by the original

`(20)/(99)`
⇒Multiply by 100 to get the answer as a percentage

`(20)/(99)` × 100
=20.2%
When we have a check:
$99 × 0.202 = 19.998 ≈ $20
║
The right answer