There are 5 20s in a 100.
Four
400 ÷ 20 = 20
Five. We can check the math by adding it together. 20 + 20 + 20 + 20 + 20 = 100 or 20 + 20 = 40 (there's two twenties there) 40 + 20 = 60 (there's your third twenty) 60 + 20 = 80 (fourth twenty) 80 + 20 = 100 (fifth twenty)
one hundred2,000 / 20 = 100
20, 40, 60, 80, 100, 120 and so on.
7.5
120
4
10.3
500 20s.
113/20 = 33/20 = 100*(33/20)% = 165%