Jason joined the military when he turned 18.  It took him 8 years to raise to the rank of chief.  Then 25% longer than that to go from chief to master chief.  He then spent 10 years more in the military before retiring.  How old was he when he retired?
How many years did it take to go from chief to master chief? ** It took 8*.25=<<8*.25=2>>2 years longer to go from chief to master chief than to get chief
How many years did it take to become a master chief? ** So it takes him 8+2=<<8+2=10>>10 years to become a master chief
How many years did it take to reach master chief from enlisting? ** That means he took 10+8=<<10+8=18>>18 years to reach master chief from enlisting
How many years was he in the military? ** So he was in the military for 18+10=<<18+10=28>>28 years
How old was he when he retired? ** So he was 28+18=<<28+18=46>>46 when he retired
#### 46