Suma a trei numere este 3932/primul numar este cu 1330mai mare decat al doilea si cu 1740mai mare decat al treilea determinati cele trei numere vreau rezolvare de clasa a 5 a

The number of volunteers to walk dogs at the local animal shelter last year was 20. this year, the number of volunteers has risen to 50. what is the percent of increase in the number of volunteers?