Question

Abena invited 40 people to a party.
How many came if 25 % of those invited didn't come?
30
How many came if 20 % of those invited didn't come?

Answer 1

Answer:

See below.

Step-by-step explanation:

Part 1:

People who were invited and didn't come:

= 25% of 40

Key: "of" means "to multiply", % means out of 100.

$\displaystyle =\frac{25}{100} \times 40\\\\= \frac{25 \times 4}{10} \\\\=\frac{100}{10} \\\\= 10$

So,

People who came = 40 - 10

= 30 people

Part 2:

People who were invited but didn't come:

= 20% of 40

$\displaystyle =\frac{20}{100} \times 40\\\\= \frac{1}{5} \times 40\\\\= 1 \times 8\\\\= 8$

So,

People who came = 40 - 8

= 32 people

$\rule[225]{225}{2}$