Answer:
1. 200
2. 300
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
Answer: 1. 200, 2. 300
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
90 = 30%
90/3 = 30
30 = 10%
30 * 10 = 300
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