500
500
20
Multiply alternately by 0.5 and 10.
The percentage of 100 to 500 is 20%.
100/(500/100) = 20%
100 is 20% of 500.
20% of 500 = 20% * 500 = 0.2 * 500 = 100
20% of 500 = 100
500 2500.
100
Multiply by 5 4*5 = 20 20*5 = 100 100*5 = 500 500*5 = 2500