First figure out how many square feet the original bolt of fabric was: 16 feet * 12 feet = <<16*12=192>>192 square feet
Then figure out how much fabric Ann took for the living room curtains: 4 feet * 6 feet = <<4*6=24>>24 square feet
Then figure out how much fabric Ann took for the bathroom curtains: 2 feet * 4 feet = <<2*4=8>>8 square feet
Finally, subtract the square footage of both sets of curtains from the total square footage: 192 - 24 - 8 = <<192-24-8=160>>160 square feet
#### 160