Help needed #4 . Thank you

What is the order of these fractions from least to greatest 2/3 7/10 5/8 65/100

Idon't get undoing if its pass adding and subtracting so can someone ? x-2 over 5 = 18

Prove the converse of the pythagorean theorem using similar triangles. the converse of the pythagorean theorem states that when the sum of the squares of the lengths of the legs of the triangle equals the squares length of the hypotenuse, the triangle is a right triangle. be sure to create and name the appropriate geometric figures.