Answer:
62 x 10 =620
Step-by-step explanation:
multiply
450/313*10.5 = 15.09.... which is approx is 15
11x11 is 121 a way to remember it is there is one number on the left one number on the right and they add up to be 2 numbers total
20% because there are 10 numbers and 2 of them are a multiple of 5. :)