Peter spent
^{3}_{7} of his salary and gave $909 to his wife. Of the remaining amount, he saved
^{1}_{5} of it and gave
^{5}_{12} of it to his grandparents. He then donated
^{2}_{3} of what he had left away and gave the remaining $21 to his daughter. What was Peter's salary?
Spent 
Wife 
Saved 
Grandparents 
Donated 
Daughter 
Total 
3 u 
4 u 
7 u 

$909 
1 p 
4 p 




5_{x3} 
7_{x3} 





2_{x7} 
1_{x7} 




15 b 
14 b 
7 b $21 

Amount that his daughter received = 7 b
7 b = 21
1 b = 21 ÷ 7 = 3
Amount of his salary given to his grandparents, his donations and his daughter
= 15 b + 14 b + 7 b
= 36 b
= 36 x 3
= $108
4 p = 108
1 p = 108 ÷ 4 = 27
Amount of his salary given to his savings, his grandparents, his donations and his daughter
= 1 p + 4 p
= 5 p
= 5 x 27
= $135
Amount of his salary given to his wife, his savings, his grandparents, his donations and his daughter
= 909 + 135
= $1044
4 u = 1044
1 u = 1044 ÷ 4 = 261
Peter's salary
= 7 u
= 7 x 261
= $1827
Answer(s): $1827