W is a plus B plus C. It is known that a equals 18, B equals 22 and C equals 20. What percentage of W is ABC

W is a plus B plus C. It is known that a equals 18, B equals 22 and C equals 20. What percentage of W is ABC

The ratio of a to w = 18 ÷ (18 + 22 + 20) × 100% = 30%
The ratio of B to w = 22 △ (18 + 22 + 20) × 100% ≈ 36.67%
The ratio of C to w = 20 △ (18 + 22 + 20) × 100% ≈ 33.33%