% decrease:
= [(192 - 48)/192] x 100%
= [144/192] x 100%
= 0.75 x 100%
= 75%
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20% decrease
percent means out of 100: 192 % = 192/100 = 4x48/4x25 = 48/25 (as an improper (top heavy) fraction) = 123/25 (as a mixed number)
48 is 25% less than 64.
19.2 / 100 = We need to remove the decimal point, so multiply through (top and bottom) by '10' Hence 192/1000 Since both numerator and denominator a even numbers they will cancel down by '2' Hence192/1000 = 96/500 Similarly , by '2' again 96/500 = 48/250 And again 48/250 = 24/125 This will not cancel any further as '24' & '125' do NOT have any common multiples.
The greatest common factor of the numbers 144 and 192 is 48.