Percentage change = ((New figure – Old figure) / Old figure) × 100
Percentage increase = ((Higher figure – Lower figure) / Lower figure) × 100
Percentage decrease = ((Lower figure – Higher figure) / Higher figure) × 100
Percentage of one figure relative to another = (Part / Whole) × 100
To find what percentage A is of B = (A / B) × 100
To find the difference as a percentage of the original figure = ((Difference) / Original figure) × 100