2008 Section 1 Question 20

20) C

Running for 30 minutes = 3.6 years extra

Walking for 30 minutes = 1.4 years extra

Difference = 3.6 – 1.4 = 2.2 years

Percentage increase = (2.2 / 1.4) x 100 = 220 / 1.4 = 157%