Question

2.5% of what is 2.21?

Answer 1

 To get the answer do this: 

2.5% of what is 2.21

2.5%x = 2.21

2.5/100x = 2.21

0.025x = 2.21

divide both sides by 0.025

0.025x/0.025 = 2.21/0.025

x = 88.4

Answer 2

2.5/100=0.025
2.21/0.025=88.4
So the answer is 88.4