Question

What is the percent of increase from 50 to 90?

Answer 1

See the entire solution process and result below:

Explanation:

The formula for calculating the percentage or rate of change between two values is:

`p = (N - O)/O * 100`

Where:

`p` is the percent change - what we are solving for in this problem
`N` is the New Value - 90 for this problem
`O` is the Old Value - 50 for this problem

Substituting and solving for `p` gives:

`p = (90 - 50)/50 * 100`

`p = 40/50 * 100`

`p = 4000/50`

`p = 80`

There was an 80% increase.