New = base × (1 + p/100); Increase = base × p/100.
Key Concepts
- Concept: Percent as a fraction
 - Concept: Increase amount vs final value
 - Concept: Decimal vs percentage form
 
Steps
- Action: Convert percent to decimal: d = p/100
 - Action: Compute increase: inc = base × d
 - Action: Compute new value: new = base + inc
 
Formula
Increase: $$text{Increase} = text{base} times frac{p}{100}$$
New value: $$text{New value} = text{base} times left(1 + frac{p}{100}right)$$