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primary 6 | Maths
| Percentage
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Date Posted: 6 years ago
Views: 717
Children who remained = 1 - 3/8 = 5/8
Adults who remained = 1 - 4/9 = 5/9
5/8 children + 5/9 adults = 275
So, 1/8 children + 1/9 adults
= 275 ÷ 5 = 55
Multiply by 8.
So 8/8 children (all children) + 8/9 adults
= 55 × 8 = 440
Recall that all children + all adults = 475.
475 - 440 = 35 = 1/9 adults.
From here ,you can now calculate the total number of adults.
Adults who remained = 1 - 4/9 = 5/9
5/8 children + 5/9 adults = 275
So, 1/8 children + 1/9 adults
= 275 ÷ 5 = 55
Multiply by 8.
So 8/8 children (all children) + 8/9 adults
= 55 × 8 = 440
Recall that all children + all adults = 475.
475 - 440 = 35 = 1/9 adults.
From here ,you can now calculate the total number of adults.
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Notice the pattern and find the unknown slowly. Let c be 1 unit of children, let a be 1 unit of adults.
Date Posted:
6 years ago
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