A bowling supply store has 77 bowling balls without holes drilled in them. If 35% of the bowling balls do not have holes, how many bowling balls are in the store?

Step-by-step explanation:

bowling balls without holes = 77  and 35%

find: how many bowling balls in the store?

let x be the total

its a ratio and proportion:

 77   =     x      

 35        100

cross multiply:

35 (x) = 77 (100)

x = 7700 / 35

x = 220   >> total number of balls in the store

step-by-step explanation:

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