percentage 2 (revision)

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

• increased by 50

• increased by 12.5%

• decreased by 50

• decreased by 12.5%

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 change.

• decreased by $10

• decreased by 10%

• decreased by 25%

• increased by $10

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

• $10

• 10%

• 25%

• -25%

Mr Tam can finish 3000m in 20 min last year and he can do it in 18 min this year. What is the change?

• 2 min

• -2 min

• 10%

• -10%

Mr Tam can finish 3000m in 20 min last year and he can do it in 18 min this year. Find the percentage change.

• 10 min

• -10 min

• 10%

• -10%

Sam had $250 originally. If he spends 28% of the money on buying books, how much does he left?

• $80

• $70

• $180

• $195

There are 7 Year 7 students did not complete the quick challenge, which represent 2.8% of all Year 7 students. Find the number of students in Year 7.

• 20

• 25

• 196

• 250

If a shirt is sold for $800, there will be a loss of $100. How much should the shirt be sold to obtain a profit of 10%?

• $910

• $960

• $980

• $990