A city has 3 new houses for every 7 old houses. If there are 21 new houses in the city, how many old houses are there A. 49 B. 47 C. 52 D. 51
Mathematics
leyah46
Question
A city has 3 new houses for every 7 old houses. If there are 21 new houses in the city, how many old houses are there
A. 49
B. 47
C. 52
D. 51
A. 49
B. 47
C. 52
D. 51
1 Answer

1. User Answers RyanScheild
Answer:
A. 49
Stepbystep explanation:
ratio of houses is 3 new to 7 old
21 new is 7 times more than 3, so 7 will also be 7 times more
so, 21 to 49
I hope that made sense