Bonsoir;
casque:
[ (63,60- 79,50)/ (79,50)]*100
=( -15,9 /79,50)*100
=> -20%
enceinte:
[(70,20 - 108)/108 ] *100
= (-37,8 /108) *100
=> -35%
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Bonsoir;
casque:
[ (63,60- 79,50)/ (79,50)]*100
=( -15,9 /79,50)*100
=> -20%
enceinte:
[(70,20 - 108)/108 ] *100
= (-37,8 /108) *100
=> -35%