-40 + 70 = 30
The mean value of 100, 70, 70, and 20 is 65
100 + 70 = 170
the sum for 20 + 40 + 70 + 80 = 210
40, as a percentage of 70 = 100*40/70 = 57.14 (to 2 dp)
28 is 40% of 70. 28 * 100/40 = 70
40
percentage = 40%% rate:= 28/70 * 100%= 0.40 * 100%= 40%
percentage = 175%% rate:= 70/40 * 100%= 1.75 * 100%= 175%
40 parts of 20 % plus 60 parts of 70 %
190
70