7. A venture's common equity account increased by $100,000 the past year and ended the year at $500,000. What was its sustainable sales growth rate (approximately)? 25% or 20%? a. 15% b. 25% c. 33% d. 20% 8. A venture's common equity account increased by $100,000 the past year and ended the year at $500,000. What was its sustainable sales growth rate (do not use the approximation formula)? a. 15% b. 25% c. 33% d. 20% Please provide formula for approximation and non-approximation question. I cannot figure out the difference in formula for each question.