To solve the problem "56 is what percent of 707" students used the following models
Noah's model:
+7
0 7 14 21 28 35 42 49 (56 43 70
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Divide 70/10=7, since 100%/10=180o.
So each # is another 10% 56 is at 80%
Carey's Model
Since 35 is half
i of 70 and 7
1 42 49 56
is 10% of 70,
t an 80% + I started at 35
and jumped 3 .
0% 10%
times to get to 56.
35
S
50%), +102
+0%.
100%
7. Use either students method to model 40% of 240.
8. Use a model to estimate what percentage is closest to 65 out of 85.