10: A bin of bolts at the hardware store contains 7-dozen bolts when full. The stock clerk is supposed to reorder bolts when the bin is 1⁄6 full. How many bolts are in the bin when it's time to reorder?

The answer is 14 bolts.

1 dozen bolts have 12 bolts.

7 dozen bolts have x bolts

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1 : 12 = 7 : x

x = 7 * 12 : 1

x = 84 bolts

1 bin has 7-dozen bolts (84 bolts).

1/6 bin has x bolts

1 : 84 = 1/6 : x

x = 84 * 1/6 : 1

x = 84/6 = 14 bolts