a) 5%·40g=
=5/100·40=
=5/10·4=
=20/10=
=2g
b)15%2500kg=
=15/100·2500=
=15·25=
=375kg
c)12%·3,6km=
=12/100·3,6=
=43.2/100=
=0,432km
d)25%·420g=
=25/100·420=
=25/10·42=
=1050/10=
=105g
e)120%·20lei=
=120/100·20=
=12/10·20=
=12·2=
=24lei
f)75%·360hl=
=75/100·360=
=75/10·36=
=2700/10=
=270hl