A.(1/6.3009-1/6.6227)×6.6227=5.1%
B.(1/6.6227-1/6.3009)×6.6227=-5.1%
C.(1-6.3009/6.6227)×6.6227=4.9%
D.(1-6.6227/6.3009)×6.6227=-5.1%