225
3/4 x 400 = 300
300 quarters = $75.00
300*3/4 = 225
80 goes in 300 for 3 3/4 or 3.75. In words that would be three and three quarters.
3/4 x 100 = 300/4 = 75
300*0.25=75 300 Quarters, times the value of a quarter (0.25 dollars), returns $75.00 dollars.
225
$75.00
3 quarters add 3 quarters = 6
75
3/4 of 100 is 75