Question

Diff. / Original amount= % of increase or decrease

Answer 1

% increase =
`\frac{\text{ Increased number -Original number }}{\text{Original number}} * 100\%`

% decrease =
`\frac{\text{ Original number - Decreased number }}{\text{Original number}} * 100\%`

Explanation:

Percentage Increase:

Let there be an original number. If it increased to a certain value we can calculate the percentage increase value with the help of following formula:

% increase =
`\frac{\text{ Increased number -Original number }}{\text{Original number}} * 100\%`

Percentage Decrease:

Let there be an original number. If it decreases to a certain value we can calculate the percentage decrease with the help of following formula:

% decrease =
`\frac{\text{ Original number - Decreased number }}{\text{Original number}} * 100\%`