you can use the Modelling tool kits - multi cut tool and hold down (shift + ctrl which should let you move 10 percent each time) this is from memory as i am at work atm
Custom built W10 Pro 64 bit, Hazwell Intel 5820, Asus X99 MOBO, 32 GB DDR4 Ram, EVGA nVidia GTX1080 Founders Edition, 512GB SSD Primary HDD, 16TB Storage, 27" Samsung 4k Display. Wacom 27QHD, Oculus Rift CV1