a tree is 1.5m a year later it becomes 2.2m what is the percentage the trees grow

It grew by 0.7

as a percentage, that's 0.7/1.5 = 0.466 = 46.7%

percent growth = [(change in height) / (starting height)] * 100%

To calculate the percentage the tree has grown, you need to find the difference between the initial height and the final height, and then divide that by the initial height. Finally, multiply the quotient by 100 to get the percentage.

1. Start by subtracting the initial height from the final height: 2.2m - 1.5m = 0.7m
2. Divide the difference by the initial height: 0.7m / 1.5m = 0.4667
3. Multiply the quotient by 100 to convert it to a percentage: 0.4667 * 100 = 46.67%

Therefore, the tree has grown by approximately 46.67%.