720
1125
ninety 10 x 8 = 80 9 x 8 = 80 - 8 = 72 90 x 8 = 720
The first ten positive integer multiples of 90 are: 1 x 90 = 90 2 x 90 = 180 3 x 90 = 270 4 x 90 = 360 5 x 90 = 450 6 x 90 = 540 7 x 90 = 630 8 x 90 = 720 9 x 90 = 810 10 x 90 = 900
(1 + 8)*(8 + 2) = 90
Complementary angles add to 90.X + (X + 8) = 902X + 8 = 902X = 82X = 41Complement = 4941 + 49 = 90
11 with 2 remaining 90 - 2 = 88 = 8 x 11
20% off means that 90 is 80% of some value, which we can call x x * .8 = 90 x = 112.5 check for answer 112.5 - .2*(112.5) = 112.5 - 22.5 = 90
None of the above - 90% is nine tenths. However, 9/10 x 8/8 = 72/80 so is 7.2 eighths (7.2 / 8 x 100 = 90) and so on ...
8 x 90 = 720
8 / 90 = 0.088888889 you multiply this number by 100 to get the result in percent: 0.088888889 x 100 = 8.888888889 %
4,098 = (4 x 1000) + (0 x 100) + (9 x 10) + (8 x 1)
72/90 X 100 Cancel fown by '10' 72/9 x 10 Cancel down by '9' 8/1 x 10 = 8 x 10 = 80 %
1/8 x 90 = 11.25