Which is greater? in order from greatest to lowest? 3/7 1/4 and 7/8

The last time i bought this product , it cost $20.00 but it looks like it cost 29. 60 today? what is the increase

In the pendulum formula t=2pi. read the problem on the picture ! ; $; $; ! ; ! ; ! ; )$; ! ; ! ; ! ; $; $; $! ; ! ; ); $; $$

Hardest math question of all time can you solve the equation. check for extraneous solutions.9∣9-8x∣ = 2x+3