Adjusting for the number of predictors, what % of the variation in MPG can be explained by variations in horsepower and weight

MPG	Horsepower	Weight
36.4	67	2950
27.5	95	2560
33.7	75	2210
44.6	67	1850
32.9	100	2615
38	67	1965
24.2	120	2930
38.1	60	1968
39.4	70	2070
25.4	116	2900
31.3	75	2542
34.1	68	1985
34	88	2395
31	82	2720
27.4	80	2670
22.3	88	2890
28	79	2625
17.6	85	3465
34.4	65	3465
20.6	105	3380