The fraction 42/100 expressed as a percentage is 42.00%. This value is rounded to two decimal places, so you can read it as “forty‑two percent.”
When you see 42 %, it means that for every 100 parts of a whole, 42 of those parts are being counted. For example, if you have a pizza cut into 100 tiny slices and you eat 42 of them, you have eaten 42 % of the pizza.
Knowing that 42 % is the same as 42/100 makes it easy to work with discounts, test scores, or any situation where a portion of a total is needed. Just multiply the total amount by 0.42 (or use the percent directly) to find the part you’re interested in.