0.3d−1.5:1 1/3 =0.84: 7/15

Question

0.3d−1.5:1 1/3 =0.84: 7/15

Answer 1

0.3d-3/2:4/3=21/25×17/7
0.3d-3/2×3/4=3/5×3
0.3d-9/8=9/5
0.3d=8/8+9/5
0.3d=117/40
d=39/4, 9 3/4, 9.75