WILL GIVE BRAINLIST IF COMPLETED TWO QUESTIONS

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

Consider a cube that has sides of length l. now consider putting the largest sphere you can inside this cube without any point on the sphere lying outside of the cube. the volume ratio -volume of the sphere/ volume of the cube is 1. 5.2 × 10−1 2. 3.8 × 10−1 3. 1.9 4. 2.5 × 10−1 5. 3.8

Landon wrote that 3−2.6=4. which statement about his answer is true?