I need help with this please

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

15m is what percent of 60m; 3m; 30m; 1.5 km? the last one is km not m

Lizette is training for a marathon. at 7: 00 she left her house and ran until 8: 30, then she walked until 11: 30. she covered a total distance of 18 miles. her running speed was six miles per hour faster than her walking speed. find her running and walking speeds in miles per hour.