Percentages

What is 10% of 275

• 27
• 27.05
• 2750
• 27.5

What is 5% of 50

• 5
• 2.5
• 2
• 3

What is 90% of 300

• 270
• 280
• 220
• 210

• 3

• 2.4

• 24

• 6

In a wetland, 400 birds are observed in 2018 and 450 birds are observed in 2019. Find the percentage change of the no. of birds.

• decreased by 12.5%

• increased by 50

• increased by 12.5%

• increased by 50%

The height of Tom is 132cm. He is 10% taller than last year. What is his height last year?

• 118.8 cm

• 119 cm

• 122 cm

• 120 cm

The fee of lunch was $40 per head. It becomes $30 per head this year. Find the percentage decrease.

• $10

• 10%

• 25%

• -25%

Which is bigger:
25% of 200 
OR
20 % of 250

• 25% of 200
• 20% of 250
• They are the same

What is the percent of the shaded region in the figure? 

• 60%
• 12%
• 40%
• 8%

What is the result when 80 is decreased by 20%?

• 60

• 64

• 72

• 16