hai so co hieu bang 19,5 . biet 75 phan tram so thu nhat bang 60 phan tram so thu hai . vay so thu hai la
2 so co tong = 486, 9 biet 40 phan tram so thu 1 = 50 phan tram so thu 2 , tim so thu 2
tong hai so la 96 tim hai so biet so thu nhat bang 50 phan tram so thu hai
hai so co tong bang 200 biet 40 phan tram so thu 1 bang 60 phan tram so thu 2 so thu 2 la bao nhieu
tinh 34% cua 27%
Tim mot so biet 35% cua no la 49
Viet so hoac ti so phan tram thich hop
36,96va 42 Ti so phan tram .....
..... va 19 ti so phan tram 27%
324 va ........... ti so phan tram 48%
90% cua 20,6km la ........?
ti so phan tram cua hai so 2 va 8 .....?
biet 10% cua so A la 18,6 .tim so A .....?
tim ti so phan tram cua ava b biet ala 324 ti so phan tram la 48% tim so b
a) tinh ti so phan tram cua hai so 37 va 42
b) tim 30% cua 97
c) tim 1 so biet 30% cua no la 72
tim hai so co hieu bang 126.8 biet so be bang 60 phan tram so lon