解由x -37.5%x =八分之五得x-3/8x=5/8即(1-3/8)x=5/8即5/8x=5/8解得x=1.
x -37.5%x =八分之五解:x -37.5%x =5/8 62.5%x=0.625 x=0.625÷62.5% x=0.625÷0.625 x=1
x-37.5%=5/8x=37.5%+62.5%x=100%x=1