Solve Exercise 3 on page 79 of Math 5 Workbook Practice, a) Find a number knowing that 30% of it is n

Solution Method:
To find a number when a% of it is b, divide b by a, then multiply by a, or multiply b by 100 then divide by a.

Answers:
a) The number is:
72 : 30 x 100 = 240
b) The amount of rice the store had before selling is:
420 : 10.5 x 100 = 4000(kg)
4000kg = 4 tons
Answers: a) 240;
             b) 4 tons;

Section Mathematics Grade 5 Page 79 Solution Practice includes 3 exercises, after solving exercise 3 on page 79 of Math Book Grade 5, please continue to see hints and methods for Solving Exercise 1 Page 79 Math Book Grade 5 and Solving Exercise 2 Page 79 Math Book Grade 5 to improve your Grade 5 math skills.