CALORIES
Suppose the principle is Y and the interest rate r. Then Y + 3rY = 815 Y + 4rY = 854 rY = 39 So Y + 3*39 = 815 Y = 815 - 3*39 = 815 - 117 = 698
DCCCXV = 815
815 = 815.0
1,5,163 and 815
% change= |815 - 925|/815 * 100%= 110/815 * 100%= 0.13496 * 100%= 13.5% (% increase)
135.8333
The percentage of 530 out of 815 is approximately 65%.
815 - 15 = 800
815 + 34 = 849
10% x 815 = 81.5
5 x 163 = 815