Question

A certain recipe calls for 2​/3 cup of flour. A chef is making an amount that is 3​/5 of the recipe. How much flour should the chef​ use?

Answer 1

if he is making 3/5 of the recipe, then he needs 3/5 of the flour.
3/5 of 2/3...." of " means multiply
3/5 * 2/3 = 6/15 which reduces to 2/5
So the chef should use 2/5 cups of flour <==