THE BIGGEST LOSER challenge

Ash and I are challenging eachother to a Biggest Loser style weight loss competition and we want you to see all the trash talk as it happens. Here's how to calculate: Week 1: 175 lbs Week 2: 170 lbs; percent: (175-170)/175 = 2.9% Week 3: 175 lbs; percent: (170-175)/175= -2.9% Week 4: 172 lbs; percent is NOT (175-172)/175 = 1.7%; the actual percent should be (X-172)/X = (170-172)/170 = -1.2%.