40 of 20 = 40 x 20 = 800 40% of 20 = 0.4 x 20 = 8
Pairs of positive integer factors of 1040 are: 1 x 1040 2 x 520 4 x 260 5 x 208 8 x 130 10 x 104 13 x 80 16 x 65 20 x 52 26 x 40 And their reverses.
40*52 = 2,080. If you need to calculate this in your head, an easy way is to first multiply 52 by 4 instead of 40. That will give you an answer of 208. Then you can multiply by 10 to get 2,080.
20 x 40 = 800
1*40 2*20 5*8
40%=52 20%=52 / 2=27 100%=27 x 5=135 so the answer is 135
52 x 40 = 2080
52 = 1.3x x = 52/1.3 x = 40
40 of 20 = 40 x 20 = 800 40% of 20 = 0.4 x 20 = 8
6x-52 = 4x+40 6x-4x = 40+52 2x = 92 Answer: x = 46
1 x 520, 2 x 260, 4 x 130, 5 x 104, 8 x 65, 10 x 52, 13 x 40, 20 x 26, 26 x 20, 40 x 13, 52 x 10, 65 x 8, 104 x 5, 130 x 4, 260 x 2, 520 x 1.
130/100 = 130% = 1.30 1.30 x 40 = 52
1 x 1040, 2 x 520, 4 x 260, 5 x 208, 8 x 130, 10 x 104, 13 x 80, 16 x 65, 20 x 52, 26 x 40 = 1040
1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520
((20,000,000 x 52) x 20) / 1,700,000 = 12,235
-18
20$ 80c