№1
42 — 20%
X — 100%
X=42×100/20=4200/20=210
X=210см
30,8 — 20%
X=30.8×100/20=3080/20=154
X=154кг
№2
9 — 75%
X=9×100/75=900/75=12
X=12см
№1
42 — 20%
X — 100%
X=42×100/20=4200/20=210
X=210см
30,8 — 20%
X — 100%
X=30.8×100/20=3080/20=154
X=154кг
№2
9 — 75%
X — 100%
X=9×100/75=900/75=12
X=12см