Wagneraidan
Wagneraidan
10-02-2016
Mathematics
contestada
25% of =15 what is in the blank?
Respuesta :
AL2006
AL2006
10-02-2016
It seems to me that the 'blank' is after 'of', and
you're looking for the number that 15 is 25% of.
OK. Call it 'M' (for 'Mystery number')
25% of M = 15
' 25% ' means 0.25 .
and
' of ' means 'times'.
So 0.25 M = 15
Divide each side by 0.25:
M = 60 .
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