question Using Apache Nifi How can you perform a mathematical operation on json attribute in Support Questions

question Using Apache Nifi How can you perform a mathematical operation on json attribute in Support Questions https://community.cloudera.com/t5/Support-Questions/Using-Apache-Nifi-How-can-you-perform-a-mathematical/m-p/285165#M211642 Hello, I want to perform a simple mathematical operation on a json attribute. I simply want to subtract 30 from the value.  Any help would be appreciated Mon, 09 Dec 2019 21:22:21 GMT fowler7878 2019-12-09T21:22:21Z