4:6=8:12

15:18 = 5:6

3 3/10 : 2 1/5 = 80 : 120

5 1/2 : 7 7/32 = 8 3/4 : 6 2/3

15/26 : 1/5 = 3/7 : 26/7

3 18/25 : 62 = 21 1/4 : 40:51

ա․ x:4 = 3:5

x = (3×4):5=12/5=2 2/5

բ․ 6:7=x:10

x = (10×6)/7=60/7= 8 4/7

գ․ 19:3 = y:18

y = (19×18)/3 = 342/3=114

դ․ 25:24 = x:12

x=(25×12) /24=300/24 = 12 2/24

ե․ 2:b = 7 :5

b=(2×5)/7=10/7=1 3/7

զ․ 14:8 = 7: b

b = (8×7)/14 = 56/14= 4

է․ 67/2 = a/200

a = (67×200)/2=13400/2=6700

ը․ 72/y = 38/65

y = (72×65)/38=4680/38

3 1/5 = 16/5 = 3, 2

19520:3,2 = 6100

1 1/2 = 3/2 = 1,5

6100×1,5=9150

9150 դրամ

181

12500:20 = 625

140×100:35=400

770×100:110=700

7/25 x 100 : 7/10=40