Question

68 is decrease by 15%

Answer 1

68 divided by 100 = 0.68
0.68 x 15 = 10.2
68-10.2 = 57.8
57.8 is your answer

Answer 2

100% - 15% = 85%
After decreasing by 15%, there will be 85% left

100% = 68
1% = 68 ÷ 100 = 0.68
85% = 0.68 x 85 = 57.8