Explanation:
To find the percentage increase, we use the following formula:
percentage increase = (new value - old value) / old value * 100%
In this case, the old value is 25 and the new value is 86. So, we can plug these values into the formula:
percentage increase = (86 - 25) / 25 * 100% = 244%
Therefore, the percentage increase from 25 to 86 is approximately 244%.