Question

68 days increased by 75%

Answer 1

25% of 68 is 1/4 of 68, so we do 68 ÷ 4 = 17
25% of 68 = 17
25% × 3 = 75%, so we do 17 × 3 = 51
Therefore, 75% of 68 is 51.
As you are increasing by this amount, just do:
68 + 51 = 119
Your answer is 119