400
25% = a quarter. A quarter of 1600 = 400 and a quarter of 4 = 1 so a quarter of 1600 - 4 = 400 - 1 that is, a quarter of 1596 = 399. The actual number, 1595, is one less so a quarter of that is a quarter less. Thus the exact answer, with only a little effort, is found to be 399-0.25 = 398.75
Around 1600 millions (about one quarter of world population)
Over 1600 millions (around one quarter of world population).
Four times. 1 mile = 1609 meters
400 meters is a 1/4 mile - there are about 1600 meters in a mile
They are: 1600 = 1 x 1600 1600 = 2 x 800 1600 = 4 x 400 1600 = 5 x 320 1600 = 8 x 200 1600 = 10 x 160 1600 = 16 x 100 1600 = 20 x 80 1600 = 25 x 64 1600 = 32 x 50 1600 = 40 x 40
45% of 1600= 45% * 1600= 0.45 * 1600= 720
2.9% of 1600= 2.9% * 1600= 0.029 * 1600= 46.4
44828% of 1600= 28% * 1600= 0.28 * 1600= 448
5% of 1600= 5% * 1600= 0.05 * 1600= 80
3.6% of 1600= 3.6% * 1600= 0.036 * 1600= 57.6