9 1/3 days
Step-by-step explanation:
- If the total change in the size of the pencil is -7/9 millimeters. Then the actual change itself is 7/9 which is a positive value.
- If each day the pencil changes by 1/12 millimeters, how many 1/12 millimeters are there in 7/9 millimeters. This is a division query;
7/9 ÷ 1/12 = 7/9 * 12/1 = 28/3
= 9 & 1/3 days
Learn More:
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