If 40% of a number is 20, then the number is Choose the correct choice from the following
A) number is 50
B) number is 70
C) number is 90
D) number is 80
E) None of these
Solution:   Let "a" be the number we seek. We get   40% × a = 20   2 × 40% × a = 2 × 20 = 40   80% × a = 40   10% × a = 40 : 8 = 5   100% × a = 5 × 10 = 50   a = 50   number is 50nswer number is 50
<result>A</result>
If 40% of a number is 20, then the number is