12 è quale percentuale di 40?
Risposta:
#12# is #color(green)(30%)# of #40#
Spiegazione:
If #12# is #x%# of#40#
poi
#color(white)("XXX")x/100 xx 40 =12#
#color(white)("XXX")40x=1200#
#color(white)("XXX")x=30#
#12# is #color(green)(30%)# of #40#
If #12# is #x%# of#40#
poi
#color(white)("XXX")x/100 xx 40 =12#
#color(white)("XXX")40x=1200#
#color(white)("XXX")x=30#