85%
It is: 34/40 times 100 = 85%
40% of 85 .4 x 85 = 34
37.5% 40*.15=6; 40-6=34
117.647%
40% of 84.99 = 33.996 (which can be rounded up to 34)
34
85
15% discount on 40 = 34
0.4 X = 34X = 34/0.40.68 X = 0.68 (34/0.4) = 57.8===============================Better way:40/34 = 68/X40X = (34 x 68)X = (34 x 68) / 40 = 57.8
34 emails
47% divide 40 by 85 and then multiply by 100
NO. 18/20 is not proportional to 34/40. 18/20 : 34/40 by cross multiplication 18 * 40 = 20 * 34 720 ≠ 680 thus 18/20 is not proportional to 34/40