(1-2 / 1) by (1-3 / 1) by (1-4 / 1) by Simple calculation by (1-1 / 100)
1/2×2/3×3/4×4/5×………… Then the adjacent numerator denominators will cancel each other, equal to 1 / 100
1/2×2/3×3/4×4/5×………… Then the adjacent numerator denominators will cancel each other, equal to 1 / 100