Question

Russell has a collection of 1,200 pennies of these pennies, 25% are dated before 1980, 35% are dated from 1980 to 2000, and the rest are dated after 2000.

How many pennies in Russell's collection are dated after 2000?

Answer 1

480 pennies after 2000

Answer 2

480

Explanation:

25% of the pennies are dated before 1980.

35% are dated from 1980 to 2000, so also before 2000.

Total percent of pennies dated before 2000:

25% + 35% = 60%

100% - 60% = 40%

Percent of pennies dated after 2000: 40%

40% of 1,200 = 40% × 1,200 = 0.4 × 1,200 = 480

Answer: 480