*Times* means *multiplied by* and can’t be used for something that is smaller.

- 3 x (times/multiplied by) 4 = (is/equals) 12.
~~Battery A has three times less power than battery B.~~

Battery A has one third of the power of battery B.

Battery A has 33% of the power of battery B.~~YouTube runs four times slower on Chrome than on Firefox.~~

YouTube runs one quarter of the speed on Chrome than it does on Firefox.

YouTube runs 25% of the speed on Chrome than it does on Firefox.