Hello,
| Customer | 2019 value | 2020 value |
| Cust A | 80 | 100 |
| Cust B | 100 | 110 |
| Customer | Growth rate |
| Cust A | 25% |
| Cust B | 10% |
I am able to calculate this growth rate. But I don't know how to calculate growth rate of grand total of Cust A and Cust B. Can you help? Thanks