The answer will be 3
If you Divide 4 into 8 you will get the constant rate of yarn per caps. You multiple the dividend time the number of caps, 6 and then you will get your answer!
Equation/set up:
4/8 = 0.5 (constant rate: 0.5)
0.5 * 6 = 3
3 ball of yarn make 6 caps!
1 ball of yarn makes 2 caps.
2 balls of yarn makes 4 caps and so on.
If it takes 4 balls of yarn to make 8 caps, then it takes 3 balls of yarn to make 6 caps.
How?
3 × 2 = 6.
3 is balls of yarn, 2 is caps made per ball of yarn.
Hope this helped! :D
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