25%x=200 x=200/25% x=800 x+35%x=540 x(1+35%)=540 x=540/1.35 x=400
x-0.78%x=8.8 22%x=8.8 x=40 48%x-12%x=36 36%x=36 x=100 156%x-x=5.6 56%x=5.6 x=1 20%x=52%x=18 72%x=18 x=18/72% x=25