Respuesta :

thetide5

Answer: 1. 200, 2. 300

Step-by-step explanation:

40 * 10/2 = 400/2 = 200

or this way:

40 = 20%

40/2 = 20

20 = 10%

20 * 10 = 200

——————————————

90 * 10/3 = 900/3 = 300

or this way:

90 = 30%

90/3 = 30

30 = 10%

30 * 10 = 300

SvetkaChem

Answer:

1. 200

2. 300

Step-by-step explanation:

1.

20% = 20/100 = 0.2

20% OF ____= 40

0.2 * x = 40

x = 40/0.2 = 20

2.

30% = 30/100 = 0.3

30% OF ____=90

0.3 * x = 90

x = 90/0.3 = 300