Mr. Brown went grocery shopping to buy meat for his annual office pienic. He bought 7% pounds of hamburger, 17.85 pounds of chicken, and 64 pounds of steak. How many pounds of meat did Mr. Brown buy?

To find the total amount of meat Mr. Brown bought, we add the pounds of hamburger, chicken, and steak together:

7% + 17.85 + 64 = 7.85 + 17.85 + 64 = 89.7 pounds

Therefore, Mr. Brown bought a total of 89.7 pounds of meat for his annual office picnic.