If 40% of a number is 24, then the number is
Pick:  A) number is 60  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 = 24   2 × 40% × a = 2 × 24 = 48   80% × a = 48   10% × a = 48 : 8 = 6   100% × a = 6 × 10 = 60   a = 60   number is 60nswer number is 60
<result>A</result>
If 40% of a number is 24, then the number is