brake efficiency

[srmoorehouse]

what should the braking efficiency range be of a properly maintained modern 4 wheel car be?

[Teddio]

Minimum efficiencies:50% for the service brake (foot pedal operated) and 16% for the parking brake (handbrake) .The latter is equivalent to holding the car stationary on a hill of gradient 1 in 6.25.

[Toureman]

http://www.motuk.co.uk/manual_3100.htm

[Thunderchild]

so if my car failed on 47 % efficiency it was not as bad as I thought as with 50 % it would have passed ?