Answer :

tibboyz123
divide 7 into 5 to find each penny value. 
7/5 = 1.4 
Thus, 1 penny is equal to 1.4 mm
100/1.4 = 71.43
Therefore 71.43 pennies is equal to 100mm.
ac0226174
The answer is 71.43
5/7=X/100

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