240 times.
10
200.
300, 600, 900, 1200, 1500 +300 . . .
1200 ÷ 20 = 60
It is: (1200-900)/1200 times 100 = 25% decrease
24
400 times.
1200/25 = 48 words per minute
least common multiple of 48 and 25 is 1200.
25% because: 1200-900 = 300 300 x 100 = 30000 30000 divided by 1200 = 25%
75 times