Answer:
A. 70/100 +4/100
B. 0.700, 0.7, 0.70
Explanation:
A. The number between Ryan's 70/100 and Sarah's 80/100 will be 70/100 + some number less than 10/100, such as ...
70/100 +4/100
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B. Trailing zeros (or their lack) don't change the value. Ryan has 70/100 = 0.70 of the grid shaded. Equivalent numbers are ...
0.70
0.7
0.700