To find a percentage of an amount;
Convert the percentage to a decimal and multiply by the amount.
'a' (the percentage) divided by 100 x b (the amount).
To write a one amount as a percentage of the other;
(e.g. What percentage of b is a?)
- Divide a (the percentage) by b (the amount);
- Multiply by 100.
(aka. Increase b by a%)