Răspuns :
100:4=25 deci amplificam cu 25 fractia 7/4=7*25/4*25= 175/100=175/10^2 ;
1000:4=250 ,, ,, cu 250 ,, 7/4=1750/1000=1750/10^3 ; etc.
1000:4=250 ,, ,, cu 250 ,, 7/4=1750/1000=1750/10^3 ; etc.