getting mfastboot is not recognized as an internal or external command error

now i am trying to flash stock firmware in moto g 3rd gen xt1550, i have downloaded "MotoG3_XT1550_OSPREY_RETASIA-INDIA_DS_2GB_5.1.1_LPI23.72-33_cid7_subsidy-DEFAULT_CFC.xml_2.zip" firmware from online and extracted all the files to minimal adb and fastboot folder, If i enter the command "mfastboot flash partition gpt.bin" i am getting "C:\Program Files\Minimal ADB and Fastboot>mfastboot flash partition gpt.bin
'mfastboot' is not recognized as an internal or external command,
operable program or batch file." error, kindly anyone help me to get back the factory firmware......:eek: